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Finding the Fourth Proportional to 665,686.20, 998,529.30 and 453,109.80

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Solution

The fourth proportional to 665,686.20, 998,529.30 and 453,109.80 is: 679,664.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,686.20 : 998,529.30 = 453,109.80 : x
  2. Step 2: Convert to fraction form
    665,686.20/998,529.30 = 453,109.80/x
  3. Step 3: Cross multiply
    665,686.20x = 998,529.30 × 453,109.80
  4. Step 4: Simplify right side
    665,686.20x = 452,443,411,417.14
  5. Step 5: Solve for x
    x = 452,443,411,417.14/665,686.20
  6. Step 6: Final answer
    x = 679,664.70

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Double scale
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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.