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Finding the Fourth Proportional to 718,989.46, 992,565 and 447,144.93

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Solution

The fourth proportional to 718,989.46, 992,565 and 447,144.93 is: 617,283.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,989.46 : 992,565 = 447,144.93 : x
  2. Step 2: Convert to fraction form
    718,989.46/992,565 = 447,144.93/x
  3. Step 3: Cross multiply
    718,989.46x = 992,565 × 447,144.93
  4. Step 4: Simplify right side
    718,989.46x = 443,820,407,445.45
  5. Step 5: Solve for x
    x = 443,820,407,445.45/718,989.46
  6. Step 6: Final answer
    x = 617,283.61

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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.