Home / 890,817.57-1,229,275.31-528,275.61

Finding the Fourth Proportional to 890,817.57, 1,229,275.31 and 528,275.61

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Solution

The fourth proportional to 890,817.57, 1,229,275.31 and 528,275.61 is: 728,988.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,817.57 : 1,229,275.31 = 528,275.61 : x
  2. Step 2: Convert to fraction form
    890,817.57/1,229,275.31 = 528,275.61/x
  3. Step 3: Cross multiply
    890,817.57x = 1,229,275.31 × 528,275.61
  4. Step 4: Simplify right side
    890,817.57x = 649,396,161,606.81
  5. Step 5: Solve for x
    x = 649,396,161,606.81/890,817.57
  6. Step 6: Final answer
    x = 728,988.95

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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.