Home / 820,147.28-1,131,803.40-462,451.28

Finding the Fourth Proportional to 820,147.28, 1,131,803.40 and 462,451.28

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Solution

The fourth proportional to 820,147.28, 1,131,803.40 and 462,451.28 is: 638,182.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,147.28 : 1,131,803.40 = 462,451.28 : x
  2. Step 2: Convert to fraction form
    820,147.28/1,131,803.40 = 462,451.28/x
  3. Step 3: Cross multiply
    820,147.28x = 1,131,803.40 × 462,451.28
  4. Step 4: Simplify right side
    820,147.28x = 523,403,931,038.35
  5. Step 5: Solve for x
    x = 523,403,931,038.35/820,147.28
  6. Step 6: Final answer
    x = 638,182.85

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.