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Finding the Fourth Proportional to 554,474.40, 831,711.60 and 402,915.30

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Solution

The fourth proportional to 554,474.40, 831,711.60 and 402,915.30 is: 604,372.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,474.40 : 831,711.60 = 402,915.30 : x
  2. Step 2: Convert to fraction form
    554,474.40/831,711.60 = 402,915.30/x
  3. Step 3: Cross multiply
    554,474.40x = 831,711.60 × 402,915.30
  4. Step 4: Simplify right side
    554,474.40x = 335,109,328,827.48
  5. Step 5: Solve for x
    x = 335,109,328,827.48/554,474.40
  6. Step 6: Final answer
    x = 604,372.95

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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.