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Finding the Fourth Proportional to 890.39, 1,228.95 and 576

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Solution

The fourth proportional to 890.39, 1,228.95 and 576 is: 795.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.39 : 1,228.95 = 576 : x
  2. Step 2: Convert to fraction form
    890.39/1,228.95 = 576/x
  3. Step 3: Cross multiply
    890.39x = 1,228.95 × 576
  4. Step 4: Simplify right side
    890.39x = 707,875.20
  5. Step 5: Solve for x
    x = 707,875.20/890.39
  6. Step 6: Final answer
    x = 795.01

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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.