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Finding the Fourth Proportional to 690.61, 953.06 and 424.95

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Solution

The fourth proportional to 690.61, 953.06 and 424.95 is: 586.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.61 : 953.06 = 424.95 : x
  2. Step 2: Convert to fraction form
    690.61/953.06 = 424.95/x
  3. Step 3: Cross multiply
    690.61x = 953.06 × 424.95
  4. Step 4: Simplify right side
    690.61x = 405,006.69
  5. Step 5: Solve for x
    x = 405,006.69/690.61
  6. Step 6: Final answer
    x = 586.45

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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.