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Finding the Fourth Proportional to 485,655.90, 728,483.85 and 130,705.80

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Solution

The fourth proportional to 485,655.90, 728,483.85 and 130,705.80 is: 196,058.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,655.90 : 728,483.85 = 130,705.80 : x
  2. Step 2: Convert to fraction form
    485,655.90/728,483.85 = 130,705.80/x
  3. Step 3: Cross multiply
    485,655.90x = 728,483.85 × 130,705.80
  4. Step 4: Simplify right side
    485,655.90x = 95,217,064,401.33
  5. Step 5: Solve for x
    x = 95,217,064,401.33/485,655.90
  6. Step 6: Final answer
    x = 196,058.70

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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.