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Finding the Fourth Proportional to 713,807.02, 985,081.26 and 391,530.70

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Solution

The fourth proportional to 713,807.02, 985,081.26 and 391,530.70 is: 540,327.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,807.02 : 985,081.26 = 391,530.70 : x
  2. Step 2: Convert to fraction form
    713,807.02/985,081.26 = 391,530.70/x
  3. Step 3: Cross multiply
    713,807.02x = 985,081.26 × 391,530.70
  4. Step 4: Simplify right side
    713,807.02x = 385,689,555,284.68
  5. Step 5: Solve for x
    x = 385,689,555,284.68/713,807.02
  6. Step 6: Final answer
    x = 540,327.49

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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.