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Finding the Fourth Proportional to 652,236.40, 978,354.60 and 278,988.40

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Solution

The fourth proportional to 652,236.40, 978,354.60 and 278,988.40 is: 418,482.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,236.40 : 978,354.60 = 278,988.40 : x
  2. Step 2: Convert to fraction form
    652,236.40/978,354.60 = 278,988.40/x
  3. Step 3: Cross multiply
    652,236.40x = 978,354.60 × 278,988.40
  4. Step 4: Simplify right side
    652,236.40x = 272,949,584,486.64
  5. Step 5: Solve for x
    x = 272,949,584,486.64/652,236.40
  6. Step 6: Final answer
    x = 418,482.60

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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.