Home / 744,230.20-1,116,345.30-428,427.40

Finding the Fourth Proportional to 744,230.20, 1,116,345.30 and 428,427.40

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Solution

The fourth proportional to 744,230.20, 1,116,345.30 and 428,427.40 is: 642,641.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    744,230.20 : 1,116,345.30 = 428,427.40 : x
  2. Step 2: Convert to fraction form
    744,230.20/1,116,345.30 = 428,427.40/x
  3. Step 3: Cross multiply
    744,230.20x = 1,116,345.30 × 428,427.40
  4. Step 4: Simplify right side
    744,230.20x = 478,272,914,381.22
  5. Step 5: Solve for x
    x = 478,272,914,381.22/744,230.20
  6. Step 6: Final answer
    x = 642,641.10

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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.