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Finding the Fourth Proportional to 867,617.80, 1,298,802.30 and 773,139.40

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Solution

The fourth proportional to 867,617.80, 1,298,802.30 and 773,139.40 is: 1,157,370.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,617.80 : 1,298,802.30 = 773,139.40 : x
  2. Step 2: Convert to fraction form
    867,617.80/1,298,802.30 = 773,139.40/x
  3. Step 3: Cross multiply
    867,617.80x = 1,298,802.30 × 773,139.40
  4. Step 4: Simplify right side
    867,617.80x = 1,004,155,230,940.62
  5. Step 5: Solve for x
    x = 1,004,155,230,940.62/867,617.80
  6. Step 6: Final answer
    x = 1,157,370.48

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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.