Home / 1,098,085.80-1,647,128.70-388,108.20

Finding the Fourth Proportional to 1,098,085.80, 1,647,128.70 and 388,108.20

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Solution

The fourth proportional to 1,098,085.80, 1,647,128.70 and 388,108.20 is: 582,162.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098,085.80 : 1,647,128.70 = 388,108.20 : x
  2. Step 2: Convert to fraction form
    1,098,085.80/1,647,128.70 = 388,108.20/x
  3. Step 3: Cross multiply
    1,098,085.80x = 1,647,128.70 × 388,108.20
  4. Step 4: Simplify right side
    1,098,085.80x = 639,264,154,925.34
  5. Step 5: Solve for x
    x = 639,264,154,925.34/1,098,085.80
  6. Step 6: Final answer
    x = 582,162.30

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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.