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Finding the Fourth Proportional to 870,588.72, 1,201,412.42 and 488,615.50

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Solution

The fourth proportional to 870,588.72, 1,201,412.42 and 488,615.50 is: 674,289.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,588.72 : 1,201,412.42 = 488,615.50 : x
  2. Step 2: Convert to fraction form
    870,588.72/1,201,412.42 = 488,615.50/x
  3. Step 3: Cross multiply
    870,588.72x = 1,201,412.42 × 488,615.50
  4. Step 4: Simplify right side
    870,588.72x = 587,028,730,304.51
  5. Step 5: Solve for x
    x = 587,028,730,304.51/870,588.72
  6. Step 6: Final answer
    x = 674,289.38

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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.