Home / 1,257,419.20-1,886,128.80-458,435.20

Finding the Fourth Proportional to 1,257,419.20, 1,886,128.80 and 458,435.20

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Solution

The fourth proportional to 1,257,419.20, 1,886,128.80 and 458,435.20 is: 687,652.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,257,419.20 : 1,886,128.80 = 458,435.20 : x
  2. Step 2: Convert to fraction form
    1,257,419.20/1,886,128.80 = 458,435.20/x
  3. Step 3: Cross multiply
    1,257,419.20x = 1,886,128.80 × 458,435.20
  4. Step 4: Simplify right side
    1,257,419.20x = 864,667,833,653.76
  5. Step 5: Solve for x
    x = 864,667,833,653.76/1,257,419.20
  6. Step 6: Final answer
    x = 687,652.80

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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.