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Finding the Fourth Proportional to 453,069.39, 679,155.18 and 212,753.10

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Solution

The fourth proportional to 453,069.39, 679,155.18 and 212,753.10 is: 318,918.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,069.39 : 679,155.18 = 212,753.10 : x
  2. Step 2: Convert to fraction form
    453,069.39/679,155.18 = 212,753.10/x
  3. Step 3: Cross multiply
    453,069.39x = 679,155.18 × 212,753.10
  4. Step 4: Simplify right side
    453,069.39x = 144,492,367,430.35
  5. Step 5: Solve for x
    x = 144,492,367,430.35/453,069.39
  6. Step 6: Final answer
    x = 318,918.85

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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.