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Finding the Fourth Proportional to 904.39, 1,248.05 and 511.41

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Solution

The fourth proportional to 904.39, 1,248.05 and 511.41 is: 705.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.39 : 1,248.05 = 511.41 : x
  2. Step 2: Convert to fraction form
    904.39/1,248.05 = 511.41/x
  3. Step 3: Cross multiply
    904.39x = 1,248.05 × 511.41
  4. Step 4: Simplify right side
    904.39x = 638,262.69
  5. Step 5: Solve for x
    x = 638,262.69/904.39
  6. Step 6: Final answer
    x = 705.74

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Double scale
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1.5x scale

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.