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Finding the Fourth Proportional to 878,622.40, 1,317,058.80 and 404,480.80

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Solution

The fourth proportional to 878,622.40, 1,317,058.80 and 404,480.80 is: 606,318.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,622.40 : 1,317,058.80 = 404,480.80 : x
  2. Step 2: Convert to fraction form
    878,622.40/1,317,058.80 = 404,480.80/x
  3. Step 3: Cross multiply
    878,622.40x = 1,317,058.80 × 404,480.80
  4. Step 4: Simplify right side
    878,622.40x = 532,724,997,071.04
  5. Step 5: Solve for x
    x = 532,724,997,071.04/878,622.40
  6. Step 6: Final answer
    x = 606,318.48

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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.