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Finding the Fourth Proportional to 369,539.80, 554,309.70 and 120,221.80

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Solution

The fourth proportional to 369,539.80, 554,309.70 and 120,221.80 is: 180,332.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    369,539.80 : 554,309.70 = 120,221.80 : x
  2. Step 2: Convert to fraction form
    369,539.80/554,309.70 = 120,221.80/x
  3. Step 3: Cross multiply
    369,539.80x = 554,309.70 × 120,221.80
  4. Step 4: Simplify right side
    369,539.80x = 66,640,109,891.46
  5. Step 5: Solve for x
    x = 66,640,109,891.46/369,539.80
  6. Step 6: Final answer
    x = 180,332.70

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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.