Home / 687,018.40-948,100.61-381,084.84

Finding the Fourth Proportional to 687,018.40, 948,100.61 and 381,084.84

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Solution

The fourth proportional to 687,018.40, 948,100.61 and 381,084.84 is: 525,905.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,018.40 : 948,100.61 = 381,084.84 : x
  2. Step 2: Convert to fraction form
    687,018.40/948,100.61 = 381,084.84/x
  3. Step 3: Cross multiply
    687,018.40x = 948,100.61 × 381,084.84
  4. Step 4: Simplify right side
    687,018.40x = 361,306,769,265.75
  5. Step 5: Solve for x
    x = 361,306,769,265.75/687,018.40
  6. Step 6: Final answer
    x = 525,905.52

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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.