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Finding the Fourth Proportional to 713,820.02, 985,099.20 and 391,543.70

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Solution

The fourth proportional to 713,820.02, 985,099.20 and 391,543.70 is: 540,345.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,820.02 : 985,099.20 = 391,543.70 : x
  2. Step 2: Convert to fraction form
    713,820.02/985,099.20 = 391,543.70/x
  3. Step 3: Cross multiply
    713,820.02x = 985,099.20 × 391,543.70
  4. Step 4: Simplify right side
    713,820.02x = 385,709,385,635.04
  5. Step 5: Solve for x
    x = 385,709,385,635.04/713,820.02
  6. Step 6: Final answer
    x = 540,345.43

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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.