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Finding the Fourth Proportional to 589,425.75, 813,407.55 and 321,153.75

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Solution

The fourth proportional to 589,425.75, 813,407.55 and 321,153.75 is: 443,192.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    589,425.75 : 813,407.55 = 321,153.75 : x
  2. Step 2: Convert to fraction form
    589,425.75/813,407.55 = 321,153.75/x
  3. Step 3: Cross multiply
    589,425.75x = 813,407.55 × 321,153.75
  4. Step 4: Simplify right side
    589,425.75x = 261,228,884,960.81
  5. Step 5: Solve for x
    x = 261,228,884,960.81/589,425.75
  6. Step 6: Final answer
    x = 443,192.18

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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.