Home / 1,319,303.25-1,978,855.52-420,708.69

Finding the Fourth Proportional to 1,319,303.25, 1,978,855.52 and 420,708.69

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Solution

The fourth proportional to 1,319,303.25, 1,978,855.52 and 420,708.69 is: 631,031.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,303.25 : 1,978,855.52 = 420,708.69 : x
  2. Step 2: Convert to fraction form
    1,319,303.25/1,978,855.52 = 420,708.69/x
  3. Step 3: Cross multiply
    1,319,303.25x = 1,978,855.52 × 420,708.69
  4. Step 4: Simplify right side
    1,319,303.25x = 832,521,711,414.93
  5. Step 5: Solve for x
    x = 832,521,711,414.93/1,319,303.25
  6. Step 6: Final answer
    x = 631,031.35

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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.