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Finding the Fourth Proportional to 384.95, 577.91 and 383.20

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Solution

The fourth proportional to 384.95, 577.91 and 383.20 is: 575.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.95 : 577.91 = 383.20 : x
  2. Step 2: Convert to fraction form
    384.95/577.91 = 383.20/x
  3. Step 3: Cross multiply
    384.95x = 577.91 × 383.20
  4. Step 4: Simplify right side
    384.95x = 221,455.11
  5. Step 5: Solve for x
    x = 221,455.11/384.95
  6. Step 6: Final answer
    x = 575.28

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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.