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Finding the Fourth Proportional to 310,288.59, 465,459.60 and 85,649.07

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Solution

The fourth proportional to 310,288.59, 465,459.60 and 85,649.07 is: 128,480.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,288.59 : 465,459.60 = 85,649.07 : x
  2. Step 2: Convert to fraction form
    310,288.59/465,459.60 = 85,649.07/x
  3. Step 3: Cross multiply
    310,288.59x = 465,459.60 × 85,649.07
  4. Step 4: Simplify right side
    310,288.59x = 39,866,181,862.57
  5. Step 5: Solve for x
    x = 39,866,181,862.57/310,288.59
  6. Step 6: Final answer
    x = 128,480.98

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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.