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Finding the Fourth Proportional to 652,356.40, 978,534.60 and 279,108.40

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Solution

The fourth proportional to 652,356.40, 978,534.60 and 279,108.40 is: 418,662.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,356.40 : 978,534.60 = 279,108.40 : x
  2. Step 2: Convert to fraction form
    652,356.40/978,534.60 = 279,108.40/x
  3. Step 3: Cross multiply
    652,356.40x = 978,534.60 × 279,108.40
  4. Step 4: Simplify right side
    652,356.40x = 273,117,226,550.64
  5. Step 5: Solve for x
    x = 273,117,226,550.64/652,356.40
  6. Step 6: Final answer
    x = 418,662.60

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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.