Home / 687,480.30-1,031,220.45-648,114.30

Finding the Fourth Proportional to 687,480.30, 1,031,220.45 and 648,114.30

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Solution

The fourth proportional to 687,480.30, 1,031,220.45 and 648,114.30 is: 972,171.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,480.30 : 1,031,220.45 = 648,114.30 : x
  2. Step 2: Convert to fraction form
    687,480.30/1,031,220.45 = 648,114.30/x
  3. Step 3: Cross multiply
    687,480.30x = 1,031,220.45 × 648,114.30
  4. Step 4: Simplify right side
    687,480.30x = 668,348,720,097.44
  5. Step 5: Solve for x
    x = 668,348,720,097.44/687,480.30
  6. Step 6: Final answer
    x = 972,171.45

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Half scale
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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.