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Finding the Fourth Proportional to 878,611, 1,316,411.88 and 479,531.76

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Solution

The fourth proportional to 878,611, 1,316,411.88 and 479,531.76 is: 718,476.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,611 : 1,316,411.88 = 479,531.76 : x
  2. Step 2: Convert to fraction form
    878,611/1,316,411.88 = 479,531.76/x
  3. Step 3: Cross multiply
    878,611x = 1,316,411.88 × 479,531.76
  4. Step 4: Simplify right side
    878,611x = 631,261,305,701.31
  5. Step 5: Solve for x
    x = 631,261,305,701.31/878,611
  6. Step 6: Final answer
    x = 718,476.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.