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Finding the Fourth Proportional to 768,378.32, 1,059,376.41 and 630,047.64

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Solution

The fourth proportional to 768,378.32, 1,059,376.41 and 630,047.64 is: 868,657.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,378.32 : 1,059,376.41 = 630,047.64 : x
  2. Step 2: Convert to fraction form
    768,378.32/1,059,376.41 = 630,047.64/x
  3. Step 3: Cross multiply
    768,378.32x = 1,059,376.41 × 630,047.64
  4. Step 4: Simplify right side
    768,378.32x = 667,457,606,992.17
  5. Step 5: Solve for x
    x = 667,457,606,992.17/768,378.32
  6. Step 6: Final answer
    x = 868,657.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.