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Finding the Fourth Proportional to 526,781, 726,726.12 and 308,878.45

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Solution

The fourth proportional to 526,781, 726,726.12 and 308,878.45 is: 426,116.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    526,781 : 726,726.12 = 308,878.45 : x
  2. Step 2: Convert to fraction form
    526,781/726,726.12 = 308,878.45/x
  3. Step 3: Cross multiply
    526,781x = 726,726.12 × 308,878.45
  4. Step 4: Simplify right side
    526,781x = 224,470,037,520.11
  5. Step 5: Solve for x
    x = 224,470,037,520.11/526,781
  6. Step 6: Final answer
    x = 426,116.43

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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.