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Finding the Fourth Proportional to 690.74, 953.32 and 544.47

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Solution

The fourth proportional to 690.74, 953.32 and 544.47 is: 751.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.74 : 953.32 = 544.47 : x
  2. Step 2: Convert to fraction form
    690.74/953.32 = 544.47/x
  3. Step 3: Cross multiply
    690.74x = 953.32 × 544.47
  4. Step 4: Simplify right side
    690.74x = 519,054.14
  5. Step 5: Solve for x
    x = 519,054.14/690.74
  6. Step 6: Final answer
    x = 751.45

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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.