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Finding the Fourth Proportional to 372,129.40, 558,323.70 and 161,918.20

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Solution

The fourth proportional to 372,129.40, 558,323.70 and 161,918.20 is: 242,933.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,129.40 : 558,323.70 = 161,918.20 : x
  2. Step 2: Convert to fraction form
    372,129.40/558,323.70 = 161,918.20/x
  3. Step 3: Cross multiply
    372,129.40x = 558,323.70 × 161,918.20
  4. Step 4: Simplify right side
    372,129.40x = 90,402,768,521.34
  5. Step 5: Solve for x
    x = 90,402,768,521.34/372,129.40
  6. Step 6: Final answer
    x = 242,933.69

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1.5x scale

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.