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Finding the Fourth Proportional to 710,388, 980,335.44 and 392,436

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Solution

The fourth proportional to 710,388, 980,335.44 and 392,436 is: 541,561.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,388 : 980,335.44 = 392,436 : x
  2. Step 2: Convert to fraction form
    710,388/980,335.44 = 392,436/x
  3. Step 3: Cross multiply
    710,388x = 980,335.44 × 392,436
  4. Step 4: Simplify right side
    710,388x = 384,718,918,731.84
  5. Step 5: Solve for x
    x = 384,718,918,731.84/710,388
  6. Step 6: Final answer
    x = 541,561.68

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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.