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Finding the Fourth Proportional to 310,294.80, 465,468.88 and 85,655.28

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Solution

The fourth proportional to 310,294.80, 465,468.88 and 85,655.28 is: 128,490.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,294.80 : 465,468.88 = 85,655.28 : x
  2. Step 2: Convert to fraction form
    310,294.80/465,468.88 = 85,655.28/x
  3. Step 3: Cross multiply
    310,294.80x = 465,468.88 × 85,655.28
  4. Step 4: Simplify right side
    310,294.80x = 39,869,867,247.69
  5. Step 5: Solve for x
    x = 39,869,867,247.69/310,294.80
  6. Step 6: Final answer
    x = 128,490.28

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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.