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Finding the Fourth Proportional to 787,643.10, 1,181,464.65 and 787,643.10

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Solution

The fourth proportional to 787,643.10, 1,181,464.65 and 787,643.10 is: 1,181,464.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    787,643.10 : 1,181,464.65 = 787,643.10 : x
  2. Step 2: Convert to fraction form
    787,643.10/1,181,464.65 = 787,643.10/x
  3. Step 3: Cross multiply
    787,643.10x = 1,181,464.65 × 787,643.10
  4. Step 4: Simplify right side
    787,643.10x = 930,572,479,466.42
  5. Step 5: Solve for x
    x = 930,572,479,466.42/787,643.10
  6. Step 6: Final answer
    x = 1,181,464.65

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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.