Home / 312,555.07-431,325.60-169,315.70

Finding the Fourth Proportional to 312,555.07, 431,325.60 and 169,315.70

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Solution

The fourth proportional to 312,555.07, 431,325.60 and 169,315.70 is: 233,655.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,555.07 : 431,325.60 = 169,315.70 : x
  2. Step 2: Convert to fraction form
    312,555.07/431,325.60 = 169,315.70/x
  3. Step 3: Cross multiply
    312,555.07x = 431,325.60 × 169,315.70
  4. Step 4: Simplify right side
    312,555.07x = 73,030,195,891.92
  5. Step 5: Solve for x
    x = 73,030,195,891.92/312,555.07
  6. Step 6: Final answer
    x = 233,655.45

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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.