Home / 728,721.81-1,005,637.44-406,452.68

Finding the Fourth Proportional to 728,721.81, 1,005,637.44 and 406,452.68

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Solution

The fourth proportional to 728,721.81, 1,005,637.44 and 406,452.68 is: 560,905.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,721.81 : 1,005,637.44 = 406,452.68 : x
  2. Step 2: Convert to fraction form
    728,721.81/1,005,637.44 = 406,452.68/x
  3. Step 3: Cross multiply
    728,721.81x = 1,005,637.44 × 406,452.68
  4. Step 4: Simplify right side
    728,721.81x = 408,744,032,596.34
  5. Step 5: Solve for x
    x = 408,744,032,596.34/728,721.81
  6. Step 6: Final answer
    x = 560,905.45

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.