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Finding the Fourth Proportional to 655.30, 904.20 and 497.89

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Solution

The fourth proportional to 655.30, 904.20 and 497.89 is: 687.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.30 : 904.20 = 497.89 : x
  2. Step 2: Convert to fraction form
    655.30/904.20 = 497.89/x
  3. Step 3: Cross multiply
    655.30x = 904.20 × 497.89
  4. Step 4: Simplify right side
    655.30x = 450,192.14
  5. Step 5: Solve for x
    x = 450,192.14/655.30
  6. Step 6: Final answer
    x = 687.00

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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.