Home / 487,414.30-731,012.10-320,108.80

Finding the Fourth Proportional to 487,414.30, 731,012.10 and 320,108.80

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Solution

The fourth proportional to 487,414.30, 731,012.10 and 320,108.80 is: 480,091.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,414.30 : 731,012.10 = 320,108.80 : x
  2. Step 2: Convert to fraction form
    487,414.30/731,012.10 = 320,108.80/x
  3. Step 3: Cross multiply
    487,414.30x = 731,012.10 × 320,108.80
  4. Step 4: Simplify right side
    487,414.30x = 234,003,406,116.48
  5. Step 5: Solve for x
    x = 234,003,406,116.48/487,414.30
  6. Step 6: Final answer
    x = 480,091.38

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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.