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Finding the Fourth Proportional to 713,818.26, 985,070.61 and 391,531.01

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Solution

The fourth proportional to 713,818.26, 985,070.61 and 391,531.01 is: 540,313.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,818.26 : 985,070.61 = 391,531.01 : x
  2. Step 2: Convert to fraction form
    713,818.26/985,070.61 = 391,531.01/x
  3. Step 3: Cross multiply
    713,818.26x = 985,070.61 × 391,531.01
  4. Step 4: Simplify right side
    713,818.26x = 385,685,685,929.26
  5. Step 5: Solve for x
    x = 385,685,685,929.26/713,818.26
  6. Step 6: Final answer
    x = 540,313.56

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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.