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Finding the Fourth Proportional to 539,075.20, 808,612.80 and 139,712.80

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Solution

The fourth proportional to 539,075.20, 808,612.80 and 139,712.80 is: 209,569.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,075.20 : 808,612.80 = 139,712.80 : x
  2. Step 2: Convert to fraction form
    539,075.20/808,612.80 = 139,712.80/x
  3. Step 3: Cross multiply
    539,075.20x = 808,612.80 × 139,712.80
  4. Step 4: Simplify right side
    539,075.20x = 112,973,558,403.84
  5. Step 5: Solve for x
    x = 112,973,558,403.84/539,075.20
  6. Step 6: Final answer
    x = 209,569.20

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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.