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Finding the Fourth Proportional to 889,686.80, 1,334,530.20 and 328,648.40

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Solution

The fourth proportional to 889,686.80, 1,334,530.20 and 328,648.40 is: 492,972.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    889,686.80 : 1,334,530.20 = 328,648.40 : x
  2. Step 2: Convert to fraction form
    889,686.80/1,334,530.20 = 328,648.40/x
  3. Step 3: Cross multiply
    889,686.80x = 1,334,530.20 × 328,648.40
  4. Step 4: Simplify right side
    889,686.80x = 438,591,214,981.68
  5. Step 5: Solve for x
    x = 438,591,214,981.68/889,686.80
  6. Step 6: Final answer
    x = 492,972.60

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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.