Home / 578,851.20-868,276.80-389,894.40

Finding the Fourth Proportional to 578,851.20, 868,276.80 and 389,894.40

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Solution

The fourth proportional to 578,851.20, 868,276.80 and 389,894.40 is: 584,841.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,851.20 : 868,276.80 = 389,894.40 : x
  2. Step 2: Convert to fraction form
    578,851.20/868,276.80 = 389,894.40/x
  3. Step 3: Cross multiply
    578,851.20x = 868,276.80 × 389,894.40
  4. Step 4: Simplify right side
    578,851.20x = 338,536,261,969.92
  5. Step 5: Solve for x
    x = 338,536,261,969.92/578,851.20
  6. Step 6: Final answer
    x = 584,841.60

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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.