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Finding the Fourth Proportional to 557,609.90, 769,476.58 and 315,887.54

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Solution

The fourth proportional to 557,609.90, 769,476.58 and 315,887.54 is: 435,910.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,609.90 : 769,476.58 = 315,887.54 : x
  2. Step 2: Convert to fraction form
    557,609.90/769,476.58 = 315,887.54/x
  3. Step 3: Cross multiply
    557,609.90x = 769,476.58 × 315,887.54
  4. Step 4: Simplify right side
    557,609.90x = 243,068,059,306.71
  5. Step 5: Solve for x
    x = 243,068,059,306.71/557,609.90
  6. Step 6: Final answer
    x = 435,910.59

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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.