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Finding the Fourth Proportional to 310,639.74, 426,052.34 and 306,959.10

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Solution

The fourth proportional to 310,639.74, 426,052.34 and 306,959.10 is: 421,004.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,639.74 : 426,052.34 = 306,959.10 : x
  2. Step 2: Convert to fraction form
    310,639.74/426,052.34 = 306,959.10/x
  3. Step 3: Cross multiply
    310,639.74x = 426,052.34 × 306,959.10
  4. Step 4: Simplify right side
    310,639.74x = 130,780,641,304.50
  5. Step 5: Solve for x
    x = 130,780,641,304.50/310,639.74
  6. Step 6: Final answer
    x = 421,004.22

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.