Home / 890,818.57-1,229,276.68-528,276.61

Finding the Fourth Proportional to 890,818.57, 1,229,276.68 and 528,276.61

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Solution

The fourth proportional to 890,818.57, 1,229,276.68 and 528,276.61 is: 728,990.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,818.57 : 1,229,276.68 = 528,276.61 : x
  2. Step 2: Convert to fraction form
    890,818.57/1,229,276.68 = 528,276.61/x
  3. Step 3: Cross multiply
    890,818.57x = 1,229,276.68 × 528,276.61
  4. Step 4: Simplify right side
    890,818.57x = 649,398,117,262.46
  5. Step 5: Solve for x
    x = 649,398,117,262.46/890,818.57
  6. Step 6: Final answer
    x = 728,990.32

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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.