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Finding the Fourth Proportional to 612,076.40, 918,114.60 and 212,584.40

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Solution

The fourth proportional to 612,076.40, 918,114.60 and 212,584.40 is: 318,876.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,076.40 : 918,114.60 = 212,584.40 : x
  2. Step 2: Convert to fraction form
    612,076.40/918,114.60 = 212,584.40/x
  3. Step 3: Cross multiply
    612,076.40x = 918,114.60 × 212,584.40
  4. Step 4: Simplify right side
    612,076.40x = 195,176,841,372.24
  5. Step 5: Solve for x
    x = 195,176,841,372.24/612,076.40
  6. Step 6: Final answer
    x = 318,876.60

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Similar ratio
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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.