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Finding the Fourth Proportional to 643,451.18, 888,041.37 and 371,518.61

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Solution

The fourth proportional to 643,451.18, 888,041.37 and 371,518.61 is: 512,741.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,451.18 : 888,041.37 = 371,518.61 : x
  2. Step 2: Convert to fraction form
    643,451.18/888,041.37 = 371,518.61/x
  3. Step 3: Cross multiply
    643,451.18x = 888,041.37 × 371,518.61
  4. Step 4: Simplify right side
    643,451.18x = 329,923,898,361.28
  5. Step 5: Solve for x
    x = 329,923,898,361.28/643,451.18
  6. Step 6: Final answer
    x = 512,741.15

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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.