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Finding the Fourth Proportional to 530.40, 732.12 and 309.44

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Solution

The fourth proportional to 530.40, 732.12 and 309.44 is: 427.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.40 : 732.12 = 309.44 : x
  2. Step 2: Convert to fraction form
    530.40/732.12 = 309.44/x
  3. Step 3: Cross multiply
    530.40x = 732.12 × 309.44
  4. Step 4: Simplify right side
    530.40x = 226,547.21
  5. Step 5: Solve for x
    x = 226,547.21/530.40
  6. Step 6: Final answer
    x = 427.13

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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.