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Finding the Fourth Proportional to 904.32, 1,356.25 and 384.30

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Solution

The fourth proportional to 904.32, 1,356.25 and 384.30 is: 576.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.32 : 1,356.25 = 384.30 : x
  2. Step 2: Convert to fraction form
    904.32/1,356.25 = 384.30/x
  3. Step 3: Cross multiply
    904.32x = 1,356.25 × 384.30
  4. Step 4: Simplify right side
    904.32x = 521,206.88
  5. Step 5: Solve for x
    x = 521,206.88/904.32
  6. Step 6: Final answer
    x = 576.35

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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.