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Finding the Fourth Proportional to 316,972.58, 472,156 and 300,143.30

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Solution

The fourth proportional to 316,972.58, 472,156 and 300,143.30 is: 447,087.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,972.58 : 472,156 = 300,143.30 : x
  2. Step 2: Convert to fraction form
    316,972.58/472,156 = 300,143.30/x
  3. Step 3: Cross multiply
    316,972.58x = 472,156 × 300,143.30
  4. Step 4: Simplify right side
    316,972.58x = 141,714,459,954.80
  5. Step 5: Solve for x
    x = 141,714,459,954.80/316,972.58
  6. Step 6: Final answer
    x = 447,087.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.