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Finding the Fourth Proportional to 385,000.58, 531,304.16 and 212,909.60

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Solution

The fourth proportional to 385,000.58, 531,304.16 and 212,909.60 is: 293,817.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,000.58 : 531,304.16 = 212,909.60 : x
  2. Step 2: Convert to fraction form
    385,000.58/531,304.16 = 212,909.60/x
  3. Step 3: Cross multiply
    385,000.58x = 531,304.16 × 212,909.60
  4. Step 4: Simplify right side
    385,000.58x = 113,119,752,462.87
  5. Step 5: Solve for x
    x = 113,119,752,462.87/385,000.58
  6. Step 6: Final answer
    x = 293,817.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.