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Finding the Fourth Proportional to 718,240.30, 991,261.32 and 412,412.44

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Solution

The fourth proportional to 718,240.30, 991,261.32 and 412,412.44 is: 569,180.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,240.30 : 991,261.32 = 412,412.44 : x
  2. Step 2: Convert to fraction form
    718,240.30/991,261.32 = 412,412.44/x
  3. Step 3: Cross multiply
    718,240.30x = 991,261.32 × 412,412.44
  4. Step 4: Simplify right side
    718,240.30x = 408,808,499,658.82
  5. Step 5: Solve for x
    x = 408,808,499,658.82/718,240.30
  6. Step 6: Final answer
    x = 569,180.68

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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.