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Finding the Fourth Proportional to 709,715.10, 979,275.80 and 403,773.62

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Solution

The fourth proportional to 709,715.10, 979,275.80 and 403,773.62 is: 557,133.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,715.10 : 979,275.80 = 403,773.62 : x
  2. Step 2: Convert to fraction form
    709,715.10/979,275.80 = 403,773.62/x
  3. Step 3: Cross multiply
    709,715.10x = 979,275.80 × 403,773.62
  4. Step 4: Simplify right side
    709,715.10x = 395,405,727,829.15
  5. Step 5: Solve for x
    x = 395,405,727,829.15/709,715.10
  6. Step 6: Final answer
    x = 557,133.04

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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.