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Finding the Fourth Proportional to 461,314.80, 691,842.60 and 145,868.40

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Solution

The fourth proportional to 461,314.80, 691,842.60 and 145,868.40 is: 218,761.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    461,314.80 : 691,842.60 = 145,868.40 : x
  2. Step 2: Convert to fraction form
    461,314.80/691,842.60 = 145,868.40/x
  3. Step 3: Cross multiply
    461,314.80x = 691,842.60 × 145,868.40
  4. Step 4: Simplify right side
    461,314.80x = 100,917,973,113.84
  5. Step 5: Solve for x
    x = 100,917,973,113.84/461,314.80
  6. Step 6: Final answer
    x = 218,761.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.