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Finding the Fourth Proportional to 904.53, 1,356.85 and 319.62

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Solution

The fourth proportional to 904.53, 1,356.85 and 319.62 is: 479.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.53 : 1,356.85 = 319.62 : x
  2. Step 2: Convert to fraction form
    904.53/1,356.85 = 319.62/x
  3. Step 3: Cross multiply
    904.53x = 1,356.85 × 319.62
  4. Step 4: Simplify right side
    904.53x = 433,678.07
  5. Step 5: Solve for x
    x = 433,678.07/904.53
  6. Step 6: Final answer
    x = 479.45

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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.