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Finding the Fourth Proportional to 421,690.88, 582,288 and 301,201.76

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Solution

The fourth proportional to 421,690.88, 582,288 and 301,201.76 is: 415,911.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,690.88 : 582,288 = 301,201.76 : x
  2. Step 2: Convert to fraction form
    421,690.88/582,288 = 301,201.76/x
  3. Step 3: Cross multiply
    421,690.88x = 582,288 × 301,201.76
  4. Step 4: Simplify right side
    421,690.88x = 175,386,170,426.88
  5. Step 5: Solve for x
    x = 175,386,170,426.88/421,690.88
  6. Step 6: Final answer
    x = 415,911.70

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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.