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Finding the Fourth Proportional to 890.93, 1,336.40 and 584.72

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Solution

The fourth proportional to 890.93, 1,336.40 and 584.72 is: 877.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.93 : 1,336.40 = 584.72 : x
  2. Step 2: Convert to fraction form
    890.93/1,336.40 = 584.72/x
  3. Step 3: Cross multiply
    890.93x = 1,336.40 × 584.72
  4. Step 4: Simplify right side
    890.93x = 781,416.88
  5. Step 5: Solve for x
    x = 781,416.88/890.93
  6. Step 6: Final answer
    x = 877.08

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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.