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Finding the Fourth Proportional to 904.07, 1,356.17 and 319.01

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Solution

The fourth proportional to 904.07, 1,356.17 and 319.01 is: 478.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.07 : 1,356.17 = 319.01 : x
  2. Step 2: Convert to fraction form
    904.07/1,356.17 = 319.01/x
  3. Step 3: Cross multiply
    904.07x = 1,356.17 × 319.01
  4. Step 4: Simplify right side
    904.07x = 432,631.79
  5. Step 5: Solve for x
    x = 432,631.79/904.07
  6. Step 6: Final answer
    x = 478.54

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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.