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Finding the Fourth Proportional to 614.99, 921.90 and 395.00

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Solution

The fourth proportional to 614.99, 921.90 and 395.00 is: 592.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.99 : 921.90 = 395.00 : x
  2. Step 2: Convert to fraction form
    614.99/921.90 = 395.00/x
  3. Step 3: Cross multiply
    614.99x = 921.90 × 395.00
  4. Step 4: Simplify right side
    614.99x = 364,150.83
  5. Step 5: Solve for x
    x = 364,150.83/614.99
  6. Step 6: Final answer
    x = 592.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.