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Finding the Fourth Proportional to 647,553.30, 971,329.95 and 253,569.30

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Solution

The fourth proportional to 647,553.30, 971,329.95 and 253,569.30 is: 380,353.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,553.30 : 971,329.95 = 253,569.30 : x
  2. Step 2: Convert to fraction form
    647,553.30/971,329.95 = 253,569.30/x
  3. Step 3: Cross multiply
    647,553.30x = 971,329.95 × 253,569.30
  4. Step 4: Simplify right side
    647,553.30x = 246,299,455,490.54
  5. Step 5: Solve for x
    x = 246,299,455,490.54/647,553.30
  6. Step 6: Final answer
    x = 380,353.95

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Double scale
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Similar ratio
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1.5x scale

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.