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Finding the Fourth Proportional to 543,643.20, 815,464.80 and 144,345.60

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Solution

The fourth proportional to 543,643.20, 815,464.80 and 144,345.60 is: 216,518.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,643.20 : 815,464.80 = 144,345.60 : x
  2. Step 2: Convert to fraction form
    543,643.20/815,464.80 = 144,345.60/x
  3. Step 3: Cross multiply
    543,643.20x = 815,464.80 × 144,345.60
  4. Step 4: Simplify right side
    543,643.20x = 117,708,755,834.88
  5. Step 5: Solve for x
    x = 117,708,755,834.88/543,643.20
  6. Step 6: Final answer
    x = 216,518.40

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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.