Home / 427,271.28-640,709.58-157,331.61

Finding the Fourth Proportional to 427,271.28, 640,709.58 and 157,331.61

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Solution

The fourth proportional to 427,271.28, 640,709.58 and 157,331.61 is: 235,924.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,271.28 : 640,709.58 = 157,331.61 : x
  2. Step 2: Convert to fraction form
    427,271.28/640,709.58 = 157,331.61/x
  3. Step 3: Cross multiply
    427,271.28x = 640,709.58 × 157,331.61
  4. Step 4: Simplify right side
    427,271.28x = 100,803,869,763.82
  5. Step 5: Solve for x
    x = 100,803,869,763.82/427,271.28
  6. Step 6: Final answer
    x = 235,924.75

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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.