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Finding the Fourth Proportional to 638,073.12, 880,580.12 and 351,593.12

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Solution

The fourth proportional to 638,073.12, 880,580.12 and 351,593.12 is: 485,220.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,073.12 : 880,580.12 = 351,593.12 : x
  2. Step 2: Convert to fraction form
    638,073.12/880,580.12 = 351,593.12/x
  3. Step 3: Cross multiply
    638,073.12x = 880,580.12 × 351,593.12
  4. Step 4: Simplify right side
    638,073.12x = 309,605,911,800.77
  5. Step 5: Solve for x
    x = 309,605,911,800.77/638,073.12
  6. Step 6: Final answer
    x = 485,220.11

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.