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Finding the Fourth Proportional to 719,516.85, 992,917.47 and 392,818.69

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Solution

The fourth proportional to 719,516.85, 992,917.47 and 392,818.69 is: 542,081.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,516.85 : 992,917.47 = 392,818.69 : x
  2. Step 2: Convert to fraction form
    719,516.85/992,917.47 = 392,818.69/x
  3. Step 3: Cross multiply
    719,516.85x = 992,917.47 × 392,818.69
  4. Step 4: Simplify right side
    719,516.85x = 390,036,539,843.51
  5. Step 5: Solve for x
    x = 390,036,539,843.51/719,516.85
  6. Step 6: Final answer
    x = 542,081.18

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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.