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Finding the Fourth Proportional to 406,878.10, 561,380.55 and 243,468.83

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Solution

The fourth proportional to 406,878.10, 561,380.55 and 243,468.83 is: 335,920.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,878.10 : 561,380.55 = 243,468.83 : x
  2. Step 2: Convert to fraction form
    406,878.10/561,380.55 = 243,468.83/x
  3. Step 3: Cross multiply
    406,878.10x = 561,380.55 × 243,468.83
  4. Step 4: Simplify right side
    406,878.10x = 136,678,665,693.26
  5. Step 5: Solve for x
    x = 136,678,665,693.26/406,878.10
  6. Step 6: Final answer
    x = 335,920.43

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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.