Home / 579,097.40-868,646.10-390,140.60

Finding the Fourth Proportional to 579,097.40, 868,646.10 and 390,140.60

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Solution

The fourth proportional to 579,097.40, 868,646.10 and 390,140.60 is: 585,210.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,097.40 : 868,646.10 = 390,140.60 : x
  2. Step 2: Convert to fraction form
    579,097.40/868,646.10 = 390,140.60/x
  3. Step 3: Cross multiply
    579,097.40x = 868,646.10 × 390,140.60
  4. Step 4: Simplify right side
    579,097.40x = 338,894,110,641.66
  5. Step 5: Solve for x
    x = 338,894,110,641.66/579,097.40
  6. Step 6: Final answer
    x = 585,210.90

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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.