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Finding the Fourth Proportional to 564.95, 778.52 and 407.30

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Solution

The fourth proportional to 564.95, 778.52 and 407.30 is: 561.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.95 : 778.52 = 407.30 : x
  2. Step 2: Convert to fraction form
    564.95/778.52 = 407.30/x
  3. Step 3: Cross multiply
    564.95x = 778.52 × 407.30
  4. Step 4: Simplify right side
    564.95x = 317,091.20
  5. Step 5: Solve for x
    x = 317,091.20/564.95
  6. Step 6: Final answer
    x = 561.27

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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.