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Finding the Fourth Proportional to 514,848.30, 772,272.45 and 485,979.90

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Solution

The fourth proportional to 514,848.30, 772,272.45 and 485,979.90 is: 728,969.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    514,848.30 : 772,272.45 = 485,979.90 : x
  2. Step 2: Convert to fraction form
    514,848.30/772,272.45 = 485,979.90/x
  3. Step 3: Cross multiply
    514,848.30x = 772,272.45 × 485,979.90
  4. Step 4: Simplify right side
    514,848.30x = 375,308,888,023.76
  5. Step 5: Solve for x
    x = 375,308,888,023.76/514,848.30
  6. Step 6: Final answer
    x = 728,969.85

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Double scale
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Similar ratio
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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.