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Finding the Fourth Proportional to 634,875.92, 876,126.18 and 348,400.78

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Solution

The fourth proportional to 634,875.92, 876,126.18 and 348,400.78 is: 480,791.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    634,875.92 : 876,126.18 = 348,400.78 : x
  2. Step 2: Convert to fraction form
    634,875.92/876,126.18 = 348,400.78/x
  3. Step 3: Cross multiply
    634,875.92x = 876,126.18 × 348,400.78
  4. Step 4: Simplify right side
    634,875.92x = 305,243,044,490.42
  5. Step 5: Solve for x
    x = 305,243,044,490.42/634,875.92
  6. Step 6: Final answer
    x = 480,791.66

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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.