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Finding the Fourth Proportional to 612,431.30, 918,646.95 and 446,543.30

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Solution

The fourth proportional to 612,431.30, 918,646.95 and 446,543.30 is: 669,814.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,431.30 : 918,646.95 = 446,543.30 : x
  2. Step 2: Convert to fraction form
    612,431.30/918,646.95 = 446,543.30/x
  3. Step 3: Cross multiply
    612,431.30x = 918,646.95 × 446,543.30
  4. Step 4: Simplify right side
    612,431.30x = 410,215,640,587.94
  5. Step 5: Solve for x
    x = 410,215,640,587.94/612,431.30
  6. Step 6: Final answer
    x = 669,814.95

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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.