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Finding the Fourth Proportional to 368,891.60, 553,337.40 and 256,917.20

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Solution

The fourth proportional to 368,891.60, 553,337.40 and 256,917.20 is: 385,375.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,891.60 : 553,337.40 = 256,917.20 : x
  2. Step 2: Convert to fraction form
    368,891.60/553,337.40 = 256,917.20/x
  3. Step 3: Cross multiply
    368,891.60x = 553,337.40 × 256,917.20
  4. Step 4: Simplify right side
    368,891.60x = 142,161,895,463.28
  5. Step 5: Solve for x
    x = 142,161,895,463.28/368,891.60
  6. Step 6: Final answer
    x = 385,375.80

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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.