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Finding the Fourth Proportional to 527,989.60, 790,234.80 and 485,999.20

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Solution

The fourth proportional to 527,989.60, 790,234.80 and 485,999.20 is: 727,388.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    527,989.60 : 790,234.80 = 485,999.20 : x
  2. Step 2: Convert to fraction form
    527,989.60/790,234.80 = 485,999.20/x
  3. Step 3: Cross multiply
    527,989.60x = 790,234.80 × 485,999.20
  4. Step 4: Simplify right side
    527,989.60x = 384,053,480,612.16
  5. Step 5: Solve for x
    x = 384,053,480,612.16/527,989.60
  6. Step 6: Final answer
    x = 727,388.34

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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.