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Finding the Fourth Proportional to 686,590.40, 1,028,330.40 and 406,654.40

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Solution

The fourth proportional to 686,590.40, 1,028,330.40 and 406,654.40 is: 609,060.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,590.40 : 1,028,330.40 = 406,654.40 : x
  2. Step 2: Convert to fraction form
    686,590.40/1,028,330.40 = 406,654.40/x
  3. Step 3: Cross multiply
    686,590.40x = 1,028,330.40 × 406,654.40
  4. Step 4: Simplify right side
    686,590.40x = 418,175,081,813.76
  5. Step 5: Solve for x
    x = 418,175,081,813.76/686,590.40
  6. Step 6: Final answer
    x = 609,060.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.