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Finding the Fourth Proportional to 711,671.49, 982,097.91 and 389,376.95

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Solution

The fourth proportional to 711,671.49, 982,097.91 and 389,376.95 is: 537,335.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,671.49 : 982,097.91 = 389,376.95 : x
  2. Step 2: Convert to fraction form
    711,671.49/982,097.91 = 389,376.95/x
  3. Step 3: Cross multiply
    711,671.49x = 982,097.91 × 389,376.95
  4. Step 4: Simplify right side
    711,671.49x = 382,406,283,886.69
  5. Step 5: Solve for x
    x = 382,406,283,886.69/711,671.49
  6. Step 6: Final answer
    x = 537,335.40

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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.