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Finding the Fourth Proportional to 306,720.80, 460,081.20 and 85,104.80

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Solution

The fourth proportional to 306,720.80, 460,081.20 and 85,104.80 is: 127,657.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,720.80 : 460,081.20 = 85,104.80 : x
  2. Step 2: Convert to fraction form
    306,720.80/460,081.20 = 85,104.80/x
  3. Step 3: Cross multiply
    306,720.80x = 460,081.20 × 85,104.80
  4. Step 4: Simplify right side
    306,720.80x = 39,155,118,509.76
  5. Step 5: Solve for x
    x = 39,155,118,509.76/306,720.80
  6. Step 6: Final answer
    x = 127,657.20

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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.