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Finding the Fourth Proportional to 646.61, 890.93 and 567.32

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Solution

The fourth proportional to 646.61, 890.93 and 567.32 is: 781.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.61 : 890.93 = 567.32 : x
  2. Step 2: Convert to fraction form
    646.61/890.93 = 567.32/x
  3. Step 3: Cross multiply
    646.61x = 890.93 × 567.32
  4. Step 4: Simplify right side
    646.61x = 505,439.37
  5. Step 5: Solve for x
    x = 505,439.37/646.61
  6. Step 6: Final answer
    x = 781.68

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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.