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Finding the Fourth Proportional to 612,117.20, 918,175.80 and 372,616.40

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Solution

The fourth proportional to 612,117.20, 918,175.80 and 372,616.40 is: 558,924.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,117.20 : 918,175.80 = 372,616.40 : x
  2. Step 2: Convert to fraction form
    612,117.20/918,175.80 = 372,616.40/x
  3. Step 3: Cross multiply
    612,117.20x = 918,175.80 × 372,616.40
  4. Step 4: Simplify right side
    612,117.20x = 342,127,361,163.12
  5. Step 5: Solve for x
    x = 342,127,361,163.12/612,117.20
  6. Step 6: Final answer
    x = 558,924.60

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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.