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Finding the Fourth Proportional to 764.30, 1,054.75 and 432.72

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Solution

The fourth proportional to 764.30, 1,054.75 and 432.72 is: 597.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.30 : 1,054.75 = 432.72 : x
  2. Step 2: Convert to fraction form
    764.30/1,054.75 = 432.72/x
  3. Step 3: Cross multiply
    764.30x = 1,054.75 × 432.72
  4. Step 4: Simplify right side
    764.30x = 456,411.42
  5. Step 5: Solve for x
    x = 456,411.42/764.30
  6. Step 6: Final answer
    x = 597.16

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Half scale
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Double scale
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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.