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Finding the Fourth Proportional to 904.36, 1,247.70 and 554.92

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Solution

The fourth proportional to 904.36, 1,247.70 and 554.92 is: 765.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.36 : 1,247.70 = 554.92 : x
  2. Step 2: Convert to fraction form
    904.36/1,247.70 = 554.92/x
  3. Step 3: Cross multiply
    904.36x = 1,247.70 × 554.92
  4. Step 4: Simplify right side
    904.36x = 692,373.68
  5. Step 5: Solve for x
    x = 692,373.68/904.36
  6. Step 6: Final answer
    x = 765.60

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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.