Home / 880,815.90-1,215,532.05-478,407.90

Finding the Fourth Proportional to 880,815.90, 1,215,532.05 and 478,407.90

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Solution

The fourth proportional to 880,815.90, 1,215,532.05 and 478,407.90 is: 660,206.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    880,815.90 : 1,215,532.05 = 478,407.90 : x
  2. Step 2: Convert to fraction form
    880,815.90/1,215,532.05 = 478,407.90/x
  3. Step 3: Cross multiply
    880,815.90x = 1,215,532.05 × 478,407.90
  4. Step 4: Simplify right side
    880,815.90x = 581,520,135,423.20
  5. Step 5: Solve for x
    x = 581,520,135,423.20/880,815.90
  6. Step 6: Final answer
    x = 660,206.22

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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.