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Finding the Fourth Proportional to 485,130.40, 727,695.60 and 298,247.20

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Solution

The fourth proportional to 485,130.40, 727,695.60 and 298,247.20 is: 447,370.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,130.40 : 727,695.60 = 298,247.20 : x
  2. Step 2: Convert to fraction form
    485,130.40/727,695.60 = 298,247.20/x
  3. Step 3: Cross multiply
    485,130.40x = 727,695.60 × 298,247.20
  4. Step 4: Simplify right side
    485,130.40x = 217,033,175,152.32
  5. Step 5: Solve for x
    x = 217,033,175,152.32/485,130.40
  6. Step 6: Final answer
    x = 447,370.80

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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.