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Finding the Fourth Proportional to 452,690.79, 679,355.25 and 212,815.62

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Solution

The fourth proportional to 452,690.79, 679,355.25 and 212,815.62 is: 319,373.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    452,690.79 : 679,355.25 = 212,815.62 : x
  2. Step 2: Convert to fraction form
    452,690.79/679,355.25 = 212,815.62/x
  3. Step 3: Cross multiply
    452,690.79x = 679,355.25 × 212,815.62
  4. Step 4: Simplify right side
    452,690.79x = 144,577,408,729.01
  5. Step 5: Solve for x
    x = 144,577,408,729.01/452,690.79
  6. Step 6: Final answer
    x = 319,373.43

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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.