Home / 721,817.40-1,082,726.10-384,727.80

Finding the Fourth Proportional to 721,817.40, 1,082,726.10 and 384,727.80

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Solution

The fourth proportional to 721,817.40, 1,082,726.10 and 384,727.80 is: 577,091.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,817.40 : 1,082,726.10 = 384,727.80 : x
  2. Step 2: Convert to fraction form
    721,817.40/1,082,726.10 = 384,727.80/x
  3. Step 3: Cross multiply
    721,817.40x = 1,082,726.10 × 384,727.80
  4. Step 4: Simplify right side
    721,817.40x = 416,554,830,455.58
  5. Step 5: Solve for x
    x = 416,554,830,455.58/721,817.40
  6. Step 6: Final answer
    x = 577,091.70

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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.