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Finding the Fourth Proportional to 485,275.40, 728,690.70 and 367,080.20

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Solution

The fourth proportional to 485,275.40, 728,690.70 and 367,080.20 is: 551,208.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,275.40 : 728,690.70 = 367,080.20 : x
  2. Step 2: Convert to fraction form
    485,275.40/728,690.70 = 367,080.20/x
  3. Step 3: Cross multiply
    485,275.40x = 728,690.70 × 367,080.20
  4. Step 4: Simplify right side
    485,275.40x = 267,487,927,894.14
  5. Step 5: Solve for x
    x = 267,487,927,894.14/485,275.40
  6. Step 6: Final answer
    x = 551,208.51

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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.