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Finding the Fourth Proportional to 904.91, 1,356.70 and 288.26

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Solution

The fourth proportional to 904.91, 1,356.70 and 288.26 is: 432.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.91 : 1,356.70 = 288.26 : x
  2. Step 2: Convert to fraction form
    904.91/1,356.70 = 288.26/x
  3. Step 3: Cross multiply
    904.91x = 1,356.70 × 288.26
  4. Step 4: Simplify right side
    904.91x = 391,080.47
  5. Step 5: Solve for x
    x = 391,080.47/904.91
  6. Step 6: Final answer
    x = 432.18

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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.