Home / 457,965.10-686,947.65-209,133.10

Finding the Fourth Proportional to 457,965.10, 686,947.65 and 209,133.10

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Solution

The fourth proportional to 457,965.10, 686,947.65 and 209,133.10 is: 313,699.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,965.10 : 686,947.65 = 209,133.10 : x
  2. Step 2: Convert to fraction form
    457,965.10/686,947.65 = 209,133.10/x
  3. Step 3: Cross multiply
    457,965.10x = 686,947.65 × 209,133.10
  4. Step 4: Simplify right side
    457,965.10x = 143,663,491,582.22
  5. Step 5: Solve for x
    x = 143,663,491,582.22/457,965.10
  6. Step 6: Final answer
    x = 313,699.65

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Half scale
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Double scale
Find fourth proportional to 457,966.10, 686,949.15 and 209,134.10
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.