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Finding the Fourth Proportional to 514,667.80, 772,001.70 and 485,799.40

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Solution

The fourth proportional to 514,667.80, 772,001.70 and 485,799.40 is: 728,699.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    514,667.80 : 772,001.70 = 485,799.40 : x
  2. Step 2: Convert to fraction form
    514,667.80/772,001.70 = 485,799.40/x
  3. Step 3: Cross multiply
    514,667.80x = 772,001.70 × 485,799.40
  4. Step 4: Simplify right side
    514,667.80x = 375,037,962,658.98
  5. Step 5: Solve for x
    x = 375,037,962,658.98/514,667.80
  6. Step 6: Final answer
    x = 728,699.10

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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.