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Finding the Fourth Proportional to 675,013.80, 931,519.90 and 369,091.56

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Solution

The fourth proportional to 675,013.80, 931,519.90 and 369,091.56 is: 509,346.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,013.80 : 931,519.90 = 369,091.56 : x
  2. Step 2: Convert to fraction form
    675,013.80/931,519.90 = 369,091.56/x
  3. Step 3: Cross multiply
    675,013.80x = 931,519.90 × 369,091.56
  4. Step 4: Simplify right side
    675,013.80x = 343,816,133,062.04
  5. Step 5: Solve for x
    x = 343,816,133,062.04/675,013.80
  6. Step 6: Final answer
    x = 509,346.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.