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Finding the Fourth Proportional to 718,559.64, 991,578.96 and 412,420.56

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Solution

The fourth proportional to 718,559.64, 991,578.96 and 412,420.56 is: 569,121.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,559.64 : 991,578.96 = 412,420.56 : x
  2. Step 2: Convert to fraction form
    718,559.64/991,578.96 = 412,420.56/x
  3. Step 3: Cross multiply
    718,559.64x = 991,578.96 × 412,420.56
  4. Step 4: Simplify right side
    718,559.64x = 408,947,549,967.42
  5. Step 5: Solve for x
    x = 408,947,549,967.42/718,559.64
  6. Step 6: Final answer
    x = 569,121.24

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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.