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Finding the Fourth Proportional to 540,079.36, 745,287 and 310,619.32

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Solution

The fourth proportional to 540,079.36, 745,287 and 310,619.32 is: 428,641.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    540,079.36 : 745,287 = 310,619.32 : x
  2. Step 2: Convert to fraction form
    540,079.36/745,287 = 310,619.32/x
  3. Step 3: Cross multiply
    540,079.36x = 745,287 × 310,619.32
  4. Step 4: Simplify right side
    540,079.36x = 231,500,541,144.84
  5. Step 5: Solve for x
    x = 231,500,541,144.84/540,079.36
  6. Step 6: Final answer
    x = 428,641.71

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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.