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Finding the Fourth Proportional to 690.21, 953.55 and 533.46

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Solution

The fourth proportional to 690.21, 953.55 and 533.46 is: 736.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.21 : 953.55 = 533.46 : x
  2. Step 2: Convert to fraction form
    690.21/953.55 = 533.46/x
  3. Step 3: Cross multiply
    690.21x = 953.55 × 533.46
  4. Step 4: Simplify right side
    690.21x = 508,680.78
  5. Step 5: Solve for x
    x = 508,680.78/690.21
  6. Step 6: Final answer
    x = 736.99

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1.5x scale

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.