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Finding the Fourth Proportional to 870,838.13, 1,306,754.67 and 338,289.86

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Solution

The fourth proportional to 870,838.13, 1,306,754.67 and 338,289.86 is: 507,628.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,838.13 : 1,306,754.67 = 338,289.86 : x
  2. Step 2: Convert to fraction form
    870,838.13/1,306,754.67 = 338,289.86/x
  3. Step 3: Cross multiply
    870,838.13x = 1,306,754.67 × 338,289.86
  4. Step 4: Simplify right side
    870,838.13x = 442,061,854,368.65
  5. Step 5: Solve for x
    x = 442,061,854,368.65/870,838.13
  6. Step 6: Final answer
    x = 507,628.04

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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.