Home / 744,341.20-1,116,511.80-428,538.40

Finding the Fourth Proportional to 744,341.20, 1,116,511.80 and 428,538.40

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Solution

The fourth proportional to 744,341.20, 1,116,511.80 and 428,538.40 is: 642,807.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    744,341.20 : 1,116,511.80 = 428,538.40 : x
  2. Step 2: Convert to fraction form
    744,341.20/1,116,511.80 = 428,538.40/x
  3. Step 3: Cross multiply
    744,341.20x = 1,116,511.80 × 428,538.40
  4. Step 4: Simplify right side
    744,341.20x = 478,468,180,353.12
  5. Step 5: Solve for x
    x = 478,468,180,353.12/744,341.20
  6. Step 6: Final answer
    x = 642,807.60

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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.