Home / 579,059.20-868,588.80-390,102.40

Finding the Fourth Proportional to 579,059.20, 868,588.80 and 390,102.40

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Solution

The fourth proportional to 579,059.20, 868,588.80 and 390,102.40 is: 585,153.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,059.20 : 868,588.80 = 390,102.40 : x
  2. Step 2: Convert to fraction form
    579,059.20/868,588.80 = 390,102.40/x
  3. Step 3: Cross multiply
    579,059.20x = 868,588.80 × 390,102.40
  4. Step 4: Simplify right side
    579,059.20x = 338,838,575,493.12
  5. Step 5: Solve for x
    x = 338,838,575,493.12/579,059.20
  6. Step 6: Final answer
    x = 585,153.60

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Double scale
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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.