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Finding the Fourth Proportional to 904.21, 1,356.65 and 356.38

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Solution

The fourth proportional to 904.21, 1,356.65 and 356.38 is: 534.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.21 : 1,356.65 = 356.38 : x
  2. Step 2: Convert to fraction form
    904.21/1,356.65 = 356.38/x
  3. Step 3: Cross multiply
    904.21x = 1,356.65 × 356.38
  4. Step 4: Simplify right side
    904.21x = 483,482.93
  5. Step 5: Solve for x
    x = 483,482.93/904.21
  6. Step 6: Final answer
    x = 534.70

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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.