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Finding the Fourth Proportional to 910,728, 1,256,817.60 and 508,320

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Solution

The fourth proportional to 910,728, 1,256,817.60 and 508,320 is: 701,488.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    910,728 : 1,256,817.60 = 508,320 : x
  2. Step 2: Convert to fraction form
    910,728/1,256,817.60 = 508,320/x
  3. Step 3: Cross multiply
    910,728x = 1,256,817.60 × 508,320
  4. Step 4: Simplify right side
    910,728x = 638,865,522,432
  5. Step 5: Solve for x
    x = 638,865,522,432/910,728
  6. Step 6: Final answer
    x = 701,488.83

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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.