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Finding the Fourth Proportional to 553,272.13, 763,508.01 and 311,557.60

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Solution

The fourth proportional to 553,272.13, 763,508.01 and 311,557.60 is: 429,945.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,272.13 : 763,508.01 = 311,557.60 : x
  2. Step 2: Convert to fraction form
    553,272.13/763,508.01 = 311,557.60/x
  3. Step 3: Cross multiply
    553,272.13x = 763,508.01 × 311,557.60
  4. Step 4: Simplify right side
    553,272.13x = 237,876,723,176.38
  5. Step 5: Solve for x
    x = 237,876,723,176.38/553,272.13
  6. Step 6: Final answer
    x = 429,945.25

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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.