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Finding the Fourth Proportional to 555.30, 763.25 and 489.42

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Solution

The fourth proportional to 555.30, 763.25 and 489.42 is: 672.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.30 : 763.25 = 489.42 : x
  2. Step 2: Convert to fraction form
    555.30/763.25 = 489.42/x
  3. Step 3: Cross multiply
    555.30x = 763.25 × 489.42
  4. Step 4: Simplify right side
    555.30x = 373,547.37
  5. Step 5: Solve for x
    x = 373,547.37/555.30
  6. Step 6: Final answer
    x = 672.69

Related Problems

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.