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Finding the Fourth Proportional to 661,712.80, 992,569.20 and 262,448.80

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Solution

The fourth proportional to 661,712.80, 992,569.20 and 262,448.80 is: 393,673.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,712.80 : 992,569.20 = 262,448.80 : x
  2. Step 2: Convert to fraction form
    661,712.80/992,569.20 = 262,448.80/x
  3. Step 3: Cross multiply
    661,712.80x = 992,569.20 × 262,448.80
  4. Step 4: Simplify right side
    661,712.80x = 260,498,595,456.96
  5. Step 5: Solve for x
    x = 260,498,595,456.96/661,712.80
  6. Step 6: Final answer
    x = 393,673.20

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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.