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Finding the Fourth Proportional to 961,608.10, 1,440,662.55 and 783,148.90

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Solution

The fourth proportional to 961,608.10, 1,440,662.55 and 783,148.90 is: 1,173,298.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    961,608.10 : 1,440,662.55 = 783,148.90 : x
  2. Step 2: Convert to fraction form
    961,608.10/1,440,662.55 = 783,148.90/x
  3. Step 3: Cross multiply
    961,608.10x = 1,440,662.55 × 783,148.90
  4. Step 4: Simplify right side
    961,608.10x = 1,128,253,291,303.70
  5. Step 5: Solve for x
    x = 1,128,253,291,303.70/961,608.10
  6. Step 6: Final answer
    x = 1,173,298.45

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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.