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Finding the Fourth Proportional to 652,054.40, 978,081.60 and 278,115.20

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Solution

The fourth proportional to 652,054.40, 978,081.60 and 278,115.20 is: 417,172.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,054.40 : 978,081.60 = 278,115.20 : x
  2. Step 2: Convert to fraction form
    652,054.40/978,081.60 = 278,115.20/x
  3. Step 3: Cross multiply
    652,054.40x = 978,081.60 × 278,115.20
  4. Step 4: Simplify right side
    652,054.40x = 272,019,359,800.32
  5. Step 5: Solve for x
    x = 272,019,359,800.32/652,054.40
  6. Step 6: Final answer
    x = 417,172.80

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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.