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Finding the Fourth Proportional to 870,679.48, 1,201,471.80 and 488,632.45

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Solution

The fourth proportional to 870,679.48, 1,201,471.80 and 488,632.45 is: 674,275.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,679.48 : 1,201,471.80 = 488,632.45 : x
  2. Step 2: Convert to fraction form
    870,679.48/1,201,471.80 = 488,632.45/x
  3. Step 3: Cross multiply
    870,679.48x = 1,201,471.80 × 488,632.45
  4. Step 4: Simplify right side
    870,679.48x = 587,078,109,239.91
  5. Step 5: Solve for x
    x = 587,078,109,239.91/870,679.48
  6. Step 6: Final answer
    x = 674,275.81

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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.