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Finding the Fourth Proportional to 567.16, 782.58 and 489.40

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Solution

The fourth proportional to 567.16, 782.58 and 489.40 is: 675.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    567.16 : 782.58 = 489.40 : x
  2. Step 2: Convert to fraction form
    567.16/782.58 = 489.40/x
  3. Step 3: Cross multiply
    567.16x = 782.58 × 489.40
  4. Step 4: Simplify right side
    567.16x = 382,994.65
  5. Step 5: Solve for x
    x = 382,994.65/567.16
  6. Step 6: Final answer
    x = 675.29

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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.