Home / 856,386.60-1,284,579.90-257,440.20

Finding the Fourth Proportional to 856,386.60, 1,284,579.90 and 257,440.20

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Solution

The fourth proportional to 856,386.60, 1,284,579.90 and 257,440.20 is: 386,160.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    856,386.60 : 1,284,579.90 = 257,440.20 : x
  2. Step 2: Convert to fraction form
    856,386.60/1,284,579.90 = 257,440.20/x
  3. Step 3: Cross multiply
    856,386.60x = 1,284,579.90 × 257,440.20
  4. Step 4: Simplify right side
    856,386.60x = 330,702,506,371.98
  5. Step 5: Solve for x
    x = 330,702,506,371.98/856,386.60
  6. Step 6: Final answer
    x = 386,160.30

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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.