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Finding the Fourth Proportional to 690.04, 953.24 and 551.08

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Solution

The fourth proportional to 690.04, 953.24 and 551.08 is: 761.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.04 : 953.24 = 551.08 : x
  2. Step 2: Convert to fraction form
    690.04/953.24 = 551.08/x
  3. Step 3: Cross multiply
    690.04x = 953.24 × 551.08
  4. Step 4: Simplify right side
    690.04x = 525,311.50
  5. Step 5: Solve for x
    x = 525,311.50/690.04
  6. Step 6: Final answer
    x = 761.28

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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.