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Finding the Fourth Proportional to 539,091.20, 808,636.80 and 139,728.80

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Solution

The fourth proportional to 539,091.20, 808,636.80 and 139,728.80 is: 209,593.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,091.20 : 808,636.80 = 139,728.80 : x
  2. Step 2: Convert to fraction form
    539,091.20/808,636.80 = 139,728.80/x
  3. Step 3: Cross multiply
    539,091.20x = 808,636.80 × 139,728.80
  4. Step 4: Simplify right side
    539,091.20x = 112,989,849,699.84
  5. Step 5: Solve for x
    x = 112,989,849,699.84/539,091.20
  6. Step 6: Final answer
    x = 209,593.20

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Similar ratio
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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.