Home / 457,955.10-686,932.65-209,123.10

Finding the Fourth Proportional to 457,955.10, 686,932.65 and 209,123.10

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Solution

The fourth proportional to 457,955.10, 686,932.65 and 209,123.10 is: 313,684.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,955.10 : 686,932.65 = 209,123.10 : x
  2. Step 2: Convert to fraction form
    457,955.10/686,932.65 = 209,123.10/x
  3. Step 3: Cross multiply
    457,955.10x = 686,932.65 × 209,123.10
  4. Step 4: Simplify right side
    457,955.10x = 143,653,485,259.22
  5. Step 5: Solve for x
    x = 143,653,485,259.22/457,955.10
  6. Step 6: Final answer
    x = 313,684.65

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Double scale
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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.