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Finding the Fourth Proportional to 1,319,697.60, 1,979,546.40 and 987,921.60

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Solution

The fourth proportional to 1,319,697.60, 1,979,546.40 and 987,921.60 is: 1,481,882.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,697.60 : 1,979,546.40 = 987,921.60 : x
  2. Step 2: Convert to fraction form
    1,319,697.60/1,979,546.40 = 987,921.60/x
  3. Step 3: Cross multiply
    1,319,697.60x = 1,979,546.40 × 987,921.60
  4. Step 4: Simplify right side
    1,319,697.60x = 1,955,636,646,762.24
  5. Step 5: Solve for x
    x = 1,955,636,646,762.24/1,319,697.60
  6. Step 6: Final answer
    x = 1,481,882.40

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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.