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Finding the Fourth Proportional to 688,652.91, 950,232.42 and 398,156.45

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Solution

The fourth proportional to 688,652.91, 950,232.42 and 398,156.45 is: 549,393.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,652.91 : 950,232.42 = 398,156.45 : x
  2. Step 2: Convert to fraction form
    688,652.91/950,232.42 = 398,156.45/x
  3. Step 3: Cross multiply
    688,652.91x = 950,232.42 × 398,156.45
  4. Step 4: Simplify right side
    688,652.91x = 378,341,162,270.95
  5. Step 5: Solve for x
    x = 378,341,162,270.95/688,652.91
  6. Step 6: Final answer
    x = 549,393.11

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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.