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Finding the Fourth Proportional to 601.30, 830.15 and 405.01

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Solution

The fourth proportional to 601.30, 830.15 and 405.01 is: 559.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    601.30 : 830.15 = 405.01 : x
  2. Step 2: Convert to fraction form
    601.30/830.15 = 405.01/x
  3. Step 3: Cross multiply
    601.30x = 830.15 × 405.01
  4. Step 4: Simplify right side
    601.30x = 336,219.05
  5. Step 5: Solve for x
    x = 336,219.05/601.30
  6. Step 6: Final answer
    x = 559.15

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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.