Home / 689,567.70-1,034,351.55-639,801.30

Finding the Fourth Proportional to 689,567.70, 1,034,351.55 and 639,801.30

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Solution

The fourth proportional to 689,567.70, 1,034,351.55 and 639,801.30 is: 959,701.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,567.70 : 1,034,351.55 = 639,801.30 : x
  2. Step 2: Convert to fraction form
    689,567.70/1,034,351.55 = 639,801.30/x
  3. Step 3: Cross multiply
    689,567.70x = 1,034,351.55 × 639,801.30
  4. Step 4: Simplify right side
    689,567.70x = 661,779,466,347.02
  5. Step 5: Solve for x
    x = 661,779,466,347.02/689,567.70
  6. Step 6: Final answer
    x = 959,701.95

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Double scale
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Similar ratio
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1.5x scale

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.