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Finding the Fourth Proportional to 308,953.34, 426,256.53 and 172,967.30

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Solution

The fourth proportional to 308,953.34, 426,256.53 and 172,967.30 is: 238,639.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,953.34 : 426,256.53 = 172,967.30 : x
  2. Step 2: Convert to fraction form
    308,953.34/426,256.53 = 172,967.30/x
  3. Step 3: Cross multiply
    308,953.34x = 426,256.53 × 172,967.30
  4. Step 4: Simplify right side
    308,953.34x = 73,728,441,101.47
  5. Step 5: Solve for x
    x = 73,728,441,101.47/308,953.34
  6. Step 6: Final answer
    x = 238,639.40

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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.