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Finding the Fourth Proportional to 1,390,419, 1,918,778.22 and 754,515

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Solution

The fourth proportional to 1,390,419, 1,918,778.22 and 754,515 is: 1,041,230.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,419 : 1,918,778.22 = 754,515 : x
  2. Step 2: Convert to fraction form
    1,390,419/1,918,778.22 = 754,515/x
  3. Step 3: Cross multiply
    1,390,419x = 1,918,778.22 × 754,515
  4. Step 4: Simplify right side
    1,390,419x = 1,447,746,948,663.30
  5. Step 5: Solve for x
    x = 1,447,746,948,663.30/1,390,419
  6. Step 6: Final answer
    x = 1,041,230.70

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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.