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Finding the Fourth Proportional to 688,588.73, 950,176.99 and 398,156.35

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Solution

The fourth proportional to 688,588.73, 950,176.99 and 398,156.35 is: 549,412.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,588.73 : 950,176.99 = 398,156.35 : x
  2. Step 2: Convert to fraction form
    688,588.73/950,176.99 = 398,156.35/x
  3. Step 3: Cross multiply
    688,588.73x = 950,176.99 × 398,156.35
  4. Step 4: Simplify right side
    688,588.73x = 378,318,997,939.20
  5. Step 5: Solve for x
    x = 378,318,997,939.20/688,588.73
  6. Step 6: Final answer
    x = 549,412.13

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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.