Home / 308,821.08-426,137.28-172,862.64

Finding the Fourth Proportional to 308,821.08, 426,137.28 and 172,862.64

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Solution

The fourth proportional to 308,821.08, 426,137.28 and 172,862.64 is: 238,530.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,821.08 : 426,137.28 = 172,862.64 : x
  2. Step 2: Convert to fraction form
    308,821.08/426,137.28 = 172,862.64/x
  3. Step 3: Cross multiply
    308,821.08x = 426,137.28 × 172,862.64
  4. Step 4: Simplify right side
    308,821.08x = 73,663,215,223.22
  5. Step 5: Solve for x
    x = 73,663,215,223.22/308,821.08
  6. Step 6: Final answer
    x = 238,530.40

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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.