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Finding the Fourth Proportional to 521.61, 718.88 and 432.63

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Solution

The fourth proportional to 521.61, 718.88 and 432.63 is: 596.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.61 : 718.88 = 432.63 : x
  2. Step 2: Convert to fraction form
    521.61/718.88 = 432.63/x
  3. Step 3: Cross multiply
    521.61x = 718.88 × 432.63
  4. Step 4: Simplify right side
    521.61x = 311,009.05
  5. Step 5: Solve for x
    x = 311,009.05/521.61
  6. Step 6: Final answer
    x = 596.25

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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.