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Finding the Fourth Proportional to 515,101.20, 772,651.80 and 215,482.20

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Solution

The fourth proportional to 515,101.20, 772,651.80 and 215,482.20 is: 323,223.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,101.20 : 772,651.80 = 215,482.20 : x
  2. Step 2: Convert to fraction form
    515,101.20/772,651.80 = 215,482.20/x
  3. Step 3: Cross multiply
    515,101.20x = 772,651.80 × 215,482.20
  4. Step 4: Simplify right side
    515,101.20x = 166,492,709,697.96
  5. Step 5: Solve for x
    x = 166,492,709,697.96/515,101.20
  6. Step 6: Final answer
    x = 323,223.30

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Double scale
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Similar ratio
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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.