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Finding the Fourth Proportional to 614.94, 921.55 and 477.35

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Solution

The fourth proportional to 614.94, 921.55 and 477.35 is: 715.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.94 : 921.55 = 477.35 : x
  2. Step 2: Convert to fraction form
    614.94/921.55 = 477.35/x
  3. Step 3: Cross multiply
    614.94x = 921.55 × 477.35
  4. Step 4: Simplify right side
    614.94x = 439,901.89
  5. Step 5: Solve for x
    x = 439,901.89/614.94
  6. Step 6: Final answer
    x = 715.36

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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.