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Finding the Fourth Proportional to 652,079.80, 978,119.70 and 372,143.80

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Solution

The fourth proportional to 652,079.80, 978,119.70 and 372,143.80 is: 558,215.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,079.80 : 978,119.70 = 372,143.80 : x
  2. Step 2: Convert to fraction form
    652,079.80/978,119.70 = 372,143.80/x
  3. Step 3: Cross multiply
    652,079.80x = 978,119.70 × 372,143.80
  4. Step 4: Simplify right side
    652,079.80x = 364,001,182,012.86
  5. Step 5: Solve for x
    x = 364,001,182,012.86/652,079.80
  6. Step 6: Final answer
    x = 558,215.70

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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.