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Finding the Fourth Proportional to 904.65, 1,248.42 and 511.70

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Solution

The fourth proportional to 904.65, 1,248.42 and 511.70 is: 706.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.65 : 1,248.42 = 511.70 : x
  2. Step 2: Convert to fraction form
    904.65/1,248.42 = 511.70/x
  3. Step 3: Cross multiply
    904.65x = 1,248.42 × 511.70
  4. Step 4: Simplify right side
    904.65x = 638,816.51
  5. Step 5: Solve for x
    x = 638,816.51/904.65
  6. Step 6: Final answer
    x = 706.15

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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.