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Finding the Fourth Proportional to 560.16, 773.28 and 405.12

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Solution

The fourth proportional to 560.16, 773.28 and 405.12 is: 559.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.16 : 773.28 = 405.12 : x
  2. Step 2: Convert to fraction form
    560.16/773.28 = 405.12/x
  3. Step 3: Cross multiply
    560.16x = 773.28 × 405.12
  4. Step 4: Simplify right side
    560.16x = 313,271.19
  5. Step 5: Solve for x
    x = 313,271.19/560.16
  6. Step 6: Final answer
    x = 559.25

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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.