Home / 1,319,343.60-1,979,015.40-420,851.10

Finding the Fourth Proportional to 1,319,343.60, 1,979,015.40 and 420,851.10

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Solution

The fourth proportional to 1,319,343.60, 1,979,015.40 and 420,851.10 is: 631,276.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,343.60 : 1,979,015.40 = 420,851.10 : x
  2. Step 2: Convert to fraction form
    1,319,343.60/1,979,015.40 = 420,851.10/x
  3. Step 3: Cross multiply
    1,319,343.60x = 1,979,015.40 × 420,851.10
  4. Step 4: Simplify right side
    1,319,343.60x = 832,870,808,006.94
  5. Step 5: Solve for x
    x = 832,870,808,006.94/1,319,343.60
  6. Step 6: Final answer
    x = 631,276.65

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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.