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Finding the Fourth Proportional to 1,668,320.91, 2,502,831.29 and 721,826.19

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Solution

The fourth proportional to 1,668,320.91, 2,502,831.29 and 721,826.19 is: 1,082,890.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,668,320.91 : 2,502,831.29 = 721,826.19 : x
  2. Step 2: Convert to fraction form
    1,668,320.91/2,502,831.29 = 721,826.19/x
  3. Step 3: Cross multiply
    1,668,320.91x = 2,502,831.29 × 721,826.19
  4. Step 4: Simplify right side
    1,668,320.91x = 1,806,609,170,664.35
  5. Step 5: Solve for x
    x = 1,806,609,170,664.35/1,668,320.91
  6. Step 6: Final answer
    x = 1,082,890.68

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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.