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Finding the Fourth Proportional to 626,428.84, 864,478.14 and 339,951.40

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Solution

The fourth proportional to 626,428.84, 864,478.14 and 339,951.40 is: 469,136.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,428.84 : 864,478.14 = 339,951.40 : x
  2. Step 2: Convert to fraction form
    626,428.84/864,478.14 = 339,951.40/x
  3. Step 3: Cross multiply
    626,428.84x = 864,478.14 × 339,951.40
  4. Step 4: Simplify right side
    626,428.84x = 293,880,553,962.40
  5. Step 5: Solve for x
    x = 293,880,553,962.40/626,428.84
  6. Step 6: Final answer
    x = 469,136.37

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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.