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Finding the Fourth Proportional to 634,873.92, 876,123.42 and 348,398.78

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Solution

The fourth proportional to 634,873.92, 876,123.42 and 348,398.78 is: 480,788.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    634,873.92 : 876,123.42 = 348,398.78 : x
  2. Step 2: Convert to fraction form
    634,873.92/876,123.42 = 348,398.78/x
  3. Step 3: Cross multiply
    634,873.92x = 876,123.42 × 348,398.78
  4. Step 4: Simplify right side
    634,873.92x = 305,240,330,657.43
  5. Step 5: Solve for x
    x = 305,240,330,657.43/634,873.92
  6. Step 6: Final answer
    x = 480,788.90

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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.