Home / 715,089.40-986,764.60-392,782.84

Finding the Fourth Proportional to 715,089.40, 986,764.60 and 392,782.84

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Solution

The fourth proportional to 715,089.40, 986,764.60 and 392,782.84 is: 542,008.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,089.40 : 986,764.60 = 392,782.84 : x
  2. Step 2: Convert to fraction form
    715,089.40/986,764.60 = 392,782.84/x
  3. Step 3: Cross multiply
    715,089.40x = 986,764.60 × 392,782.84
  4. Step 4: Simplify right side
    715,089.40x = 387,584,201,999.46
  5. Step 5: Solve for x
    x = 387,584,201,999.46/715,089.40
  6. Step 6: Final answer
    x = 542,008.04

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Double scale
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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.