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Finding the Fourth Proportional to 718,617.55, 991,441.81 and 460,636.76

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Solution

The fourth proportional to 718,617.55, 991,441.81 and 460,636.76 is: 635,518.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,617.55 : 991,441.81 = 460,636.76 : x
  2. Step 2: Convert to fraction form
    718,617.55/991,441.81 = 460,636.76/x
  3. Step 3: Cross multiply
    718,617.55x = 991,441.81 × 460,636.76
  4. Step 4: Simplify right side
    718,617.55x = 456,694,539,841.48
  5. Step 5: Solve for x
    x = 456,694,539,841.48/718,617.55
  6. Step 6: Final answer
    x = 635,518.21

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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.