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Finding the Fourth Proportional to 652,359.40, 978,539.10 and 279,111.40

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Solution

The fourth proportional to 652,359.40, 978,539.10 and 279,111.40 is: 418,667.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,359.40 : 978,539.10 = 279,111.40 : x
  2. Step 2: Convert to fraction form
    652,359.40/978,539.10 = 279,111.40/x
  3. Step 3: Cross multiply
    652,359.40x = 978,539.10 × 279,111.40
  4. Step 4: Simplify right side
    652,359.40x = 273,121,418,155.74
  5. Step 5: Solve for x
    x = 273,121,418,155.74/652,359.40
  6. Step 6: Final answer
    x = 418,667.10

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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.