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Finding the Fourth Proportional to 652,078.80, 978,118.20 and 372,142.80

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Solution

The fourth proportional to 652,078.80, 978,118.20 and 372,142.80 is: 558,214.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,078.80 : 978,118.20 = 372,142.80 : x
  2. Step 2: Convert to fraction form
    652,078.80/978,118.20 = 372,142.80/x
  3. Step 3: Cross multiply
    652,078.80x = 978,118.20 × 372,142.80
  4. Step 4: Simplify right side
    652,078.80x = 363,999,645,678.96
  5. Step 5: Solve for x
    x = 363,999,645,678.96/652,078.80
  6. Step 6: Final answer
    x = 558,214.20

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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.