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Finding the Fourth Proportional to 1,077,948.80, 1,616,923.20 and 840,003.20

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Solution

The fourth proportional to 1,077,948.80, 1,616,923.20 and 840,003.20 is: 1,260,004.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,077,948.80 : 1,616,923.20 = 840,003.20 : x
  2. Step 2: Convert to fraction form
    1,077,948.80/1,616,923.20 = 840,003.20/x
  3. Step 3: Cross multiply
    1,077,948.80x = 1,616,923.20 × 840,003.20
  4. Step 4: Simplify right side
    1,077,948.80x = 1,358,220,662,154.24
  5. Step 5: Solve for x
    x = 1,358,220,662,154.24/1,077,948.80
  6. Step 6: Final answer
    x = 1,260,004.80

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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.