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Finding the Fourth Proportional to 658,173, 908,278.74 and 356,367

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Solution

The fourth proportional to 658,173, 908,278.74 and 356,367 is: 491,786.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,173 : 908,278.74 = 356,367 : x
  2. Step 2: Convert to fraction form
    658,173/908,278.74 = 356,367/x
  3. Step 3: Cross multiply
    658,173x = 908,278.74 × 356,367
  4. Step 4: Simplify right side
    658,173x = 323,680,569,737.58
  5. Step 5: Solve for x
    x = 323,680,569,737.58/658,173
  6. Step 6: Final answer
    x = 491,786.46

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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.