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Finding the Fourth Proportional to 310,275.18, 465,439.59 and 85,635.63

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Solution

The fourth proportional to 310,275.18, 465,439.59 and 85,635.63 is: 128,460.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,275.18 : 465,439.59 = 85,635.63 : x
  2. Step 2: Convert to fraction form
    310,275.18/465,439.59 = 85,635.63/x
  3. Step 3: Cross multiply
    310,275.18x = 465,439.59 × 85,635.63
  4. Step 4: Simplify right side
    310,275.18x = 39,858,212,516.59
  5. Step 5: Solve for x
    x = 39,858,212,516.59/310,275.18
  6. Step 6: Final answer
    x = 128,460.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.