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Finding the Fourth Proportional to 702,960.60, 1,051,983.30 and 643,978.20

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Solution

The fourth proportional to 702,960.60, 1,051,983.30 and 643,978.20 is: 963,715.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,960.60 : 1,051,983.30 = 643,978.20 : x
  2. Step 2: Convert to fraction form
    702,960.60/1,051,983.30 = 643,978.20/x
  3. Step 3: Cross multiply
    702,960.60x = 1,051,983.30 × 643,978.20
  4. Step 4: Simplify right side
    702,960.60x = 677,454,311,964.06
  5. Step 5: Solve for x
    x = 677,454,311,964.06/702,960.60
  6. Step 6: Final answer
    x = 963,715.91

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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.