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Finding the Fourth Proportional to 540,343.19, 745,624.60 and 310,839.41

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Solution

The fourth proportional to 540,343.19, 745,624.60 and 310,839.41 is: 428,930.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    540,343.19 : 745,624.60 = 310,839.41 : x
  2. Step 2: Convert to fraction form
    540,343.19/745,624.60 = 310,839.41/x
  3. Step 3: Cross multiply
    540,343.19x = 745,624.60 × 310,839.41
  4. Step 4: Simplify right side
    540,343.19x = 231,769,511,832.45
  5. Step 5: Solve for x
    x = 231,769,511,832.45/540,343.19
  6. Step 6: Final answer
    x = 428,930.20

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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.