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Finding the Fourth Proportional to 572,409.40, 859,040.70 and 218,115.40

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Solution

The fourth proportional to 572,409.40, 859,040.70 and 218,115.40 is: 327,335.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,409.40 : 859,040.70 = 218,115.40 : x
  2. Step 2: Convert to fraction form
    572,409.40/859,040.70 = 218,115.40/x
  3. Step 3: Cross multiply
    572,409.40x = 859,040.70 × 218,115.40
  4. Step 4: Simplify right side
    572,409.40x = 187,370,005,896.78
  5. Step 5: Solve for x
    x = 187,370,005,896.78/572,409.40
  6. Step 6: Final answer
    x = 327,335.66

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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.