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Finding the Fourth Proportional to 530.64, 795.12 and 409.20

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Solution

The fourth proportional to 530.64, 795.12 and 409.20 is: 613.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.64 : 795.12 = 409.20 : x
  2. Step 2: Convert to fraction form
    530.64/795.12 = 409.20/x
  3. Step 3: Cross multiply
    530.64x = 795.12 × 409.20
  4. Step 4: Simplify right side
    530.64x = 325,363.10
  5. Step 5: Solve for x
    x = 325,363.10/530.64
  6. Step 6: Final answer
    x = 613.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.