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Finding the Fourth Proportional to 903.97, 1,247.14 and 530.81

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Solution

The fourth proportional to 903.97, 1,247.14 and 530.81 is: 732.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.97 : 1,247.14 = 530.81 : x
  2. Step 2: Convert to fraction form
    903.97/1,247.14 = 530.81/x
  3. Step 3: Cross multiply
    903.97x = 1,247.14 × 530.81
  4. Step 4: Simplify right side
    903.97x = 661,994.38
  5. Step 5: Solve for x
    x = 661,994.38/903.97
  6. Step 6: Final answer
    x = 732.32

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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.