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Finding the Fourth Proportional to 427,292.32, 640,889.52 and 111,779.68

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Solution

The fourth proportional to 427,292.32, 640,889.52 and 111,779.68 is: 167,656.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,292.32 : 640,889.52 = 111,779.68 : x
  2. Step 2: Convert to fraction form
    427,292.32/640,889.52 = 111,779.68/x
  3. Step 3: Cross multiply
    427,292.32x = 640,889.52 × 111,779.68
  4. Step 4: Simplify right side
    427,292.32x = 71,638,425,460.95
  5. Step 5: Solve for x
    x = 71,638,425,460.95/427,292.32
  6. Step 6: Final answer
    x = 167,656.71

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1.5x scale

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.