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Finding the Fourth Proportional to 738,679.80, 1,107,695.70 and 339,187.80

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Solution

The fourth proportional to 738,679.80, 1,107,695.70 and 339,187.80 is: 508,632.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,679.80 : 1,107,695.70 = 339,187.80 : x
  2. Step 2: Convert to fraction form
    738,679.80/1,107,695.70 = 339,187.80/x
  3. Step 3: Cross multiply
    738,679.80x = 1,107,695.70 × 339,187.80
  4. Step 4: Simplify right side
    738,679.80x = 375,716,867,552.46
  5. Step 5: Solve for x
    x = 375,716,867,552.46/738,679.80
  6. Step 6: Final answer
    x = 508,632.93

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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.