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Finding the Fourth Proportional to 530.91, 732.84 and 309.93

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Solution

The fourth proportional to 530.91, 732.84 and 309.93 is: 427.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.91 : 732.84 = 309.93 : x
  2. Step 2: Convert to fraction form
    530.91/732.84 = 309.93/x
  3. Step 3: Cross multiply
    530.91x = 732.84 × 309.93
  4. Step 4: Simplify right side
    530.91x = 227,129.10
  5. Step 5: Solve for x
    x = 227,129.10/530.91
  6. Step 6: Final answer
    x = 427.81

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