Home / 816,139.30-1,224,324.15-255,115.30

Finding the Fourth Proportional to 816,139.30, 1,224,324.15 and 255,115.30

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Solution

The fourth proportional to 816,139.30, 1,224,324.15 and 255,115.30 is: 382,708.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    816,139.30 : 1,224,324.15 = 255,115.30 : x
  2. Step 2: Convert to fraction form
    816,139.30/1,224,324.15 = 255,115.30/x
  3. Step 3: Cross multiply
    816,139.30x = 1,224,324.15 × 255,115.30
  4. Step 4: Simplify right side
    816,139.30x = 312,343,822,824.50
  5. Step 5: Solve for x
    x = 312,343,822,824.50/816,139.30
  6. Step 6: Final answer
    x = 382,708.96

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Double scale
Find fourth proportional to 816,140.30, 1,224,325.65 and 255,116.30
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.