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Finding the Fourth Proportional to 713,808.02, 985,082.64 and 391,531.70

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Solution

The fourth proportional to 713,808.02, 985,082.64 and 391,531.70 is: 540,328.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,808.02 : 985,082.64 = 391,531.70 : x
  2. Step 2: Convert to fraction form
    713,808.02/985,082.64 = 391,531.70/x
  3. Step 3: Cross multiply
    713,808.02x = 985,082.64 × 391,531.70
  4. Step 4: Simplify right side
    713,808.02x = 385,691,080,679.69
  5. Step 5: Solve for x
    x = 385,691,080,679.69/713,808.02
  6. Step 6: Final answer
    x = 540,328.87

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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.