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Finding the Fourth Proportional to 662,920.80, 994,381.20 and 572,719.20

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Solution

The fourth proportional to 662,920.80, 994,381.20 and 572,719.20 is: 859,078.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,920.80 : 994,381.20 = 572,719.20 : x
  2. Step 2: Convert to fraction form
    662,920.80/994,381.20 = 572,719.20/x
  3. Step 3: Cross multiply
    662,920.80x = 994,381.20 × 572,719.20
  4. Step 4: Simplify right side
    662,920.80x = 569,501,205,359.04
  5. Step 5: Solve for x
    x = 569,501,205,359.04/662,920.80
  6. Step 6: Final answer
    x = 859,078.80

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