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Finding the Fourth Proportional to 485,216.80, 727,695.60 and 148,256.80

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Solution

The fourth proportional to 485,216.80, 727,695.60 and 148,256.80 is: 222,345.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,216.80 : 727,695.60 = 148,256.80 : x
  2. Step 2: Convert to fraction form
    485,216.80/727,695.60 = 148,256.80/x
  3. Step 3: Cross multiply
    485,216.80x = 727,695.60 × 148,256.80
  4. Step 4: Simplify right side
    485,216.80x = 107,885,821,030.08
  5. Step 5: Solve for x
    x = 107,885,821,030.08/485,216.80
  6. Step 6: Final answer
    x = 222,345.60

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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.