Home / 659,319.40-988,979.10-612,080.20

Finding the Fourth Proportional to 659,319.40, 988,979.10 and 612,080.20

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Solution

The fourth proportional to 659,319.40, 988,979.10 and 612,080.20 is: 918,120.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,319.40 : 988,979.10 = 612,080.20 : x
  2. Step 2: Convert to fraction form
    659,319.40/988,979.10 = 612,080.20/x
  3. Step 3: Cross multiply
    659,319.40x = 988,979.10 × 612,080.20
  4. Step 4: Simplify right side
    659,319.40x = 605,334,525,323.82
  5. Step 5: Solve for x
    x = 605,334,525,323.82/659,319.40
  6. Step 6: Final answer
    x = 918,120.30

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Double scale
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Similar ratio
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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.