Home / 315,742.32-435,726-172,504.89

Finding the Fourth Proportional to 315,742.32, 435,726 and 172,504.89

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Solution

The fourth proportional to 315,742.32, 435,726 and 172,504.89 is: 238,057.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,742.32 : 435,726 = 172,504.89 : x
  2. Step 2: Convert to fraction form
    315,742.32/435,726 = 172,504.89/x
  3. Step 3: Cross multiply
    315,742.32x = 435,726 × 172,504.89
  4. Step 4: Simplify right side
    315,742.32x = 75,164,865,700.14
  5. Step 5: Solve for x
    x = 75,164,865,700.14/315,742.32
  6. Step 6: Final answer
    x = 238,057.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.