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Finding the Fourth Proportional to 215,087.40, 322,631.10 and 74,860.20

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Solution

The fourth proportional to 215,087.40, 322,631.10 and 74,860.20 is: 112,290.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,087.40 : 322,631.10 = 74,860.20 : x
  2. Step 2: Convert to fraction form
    215,087.40/322,631.10 = 74,860.20/x
  3. Step 3: Cross multiply
    215,087.40x = 322,631.10 × 74,860.20
  4. Step 4: Simplify right side
    215,087.40x = 24,152,228,672.22
  5. Step 5: Solve for x
    x = 24,152,228,672.22/215,087.40
  6. Step 6: Final answer
    x = 112,290.30

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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.