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Finding the Fourth Proportional to 917,307.20, 1,375,960.80 and 243,387.20

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Solution

The fourth proportional to 917,307.20, 1,375,960.80 and 243,387.20 is: 365,080.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,307.20 : 1,375,960.80 = 243,387.20 : x
  2. Step 2: Convert to fraction form
    917,307.20/1,375,960.80 = 243,387.20/x
  3. Step 3: Cross multiply
    917,307.20x = 1,375,960.80 × 243,387.20
  4. Step 4: Simplify right side
    917,307.20x = 334,891,246,421.76
  5. Step 5: Solve for x
    x = 334,891,246,421.76/917,307.20
  6. Step 6: Final answer
    x = 365,080.80

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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.