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Finding the Fourth Proportional to 487,139.60, 730,820.10 and 220,976.30

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Solution

The fourth proportional to 487,139.60, 730,820.10 and 220,976.30 is: 331,514.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,139.60 : 730,820.10 = 220,976.30 : x
  2. Step 2: Convert to fraction form
    487,139.60/730,820.10 = 220,976.30/x
  3. Step 3: Cross multiply
    487,139.60x = 730,820.10 × 220,976.30
  4. Step 4: Simplify right side
    487,139.60x = 161,493,921,663.63
  5. Step 5: Solve for x
    x = 161,493,921,663.63/487,139.60
  6. Step 6: Final answer
    x = 331,514.67

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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.