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Finding the Fourth Proportional to 831.04, 1,246.56 and 368.70

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Solution

The fourth proportional to 831.04, 1,246.56 and 368.70 is: 553.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.04 : 1,246.56 = 368.70 : x
  2. Step 2: Convert to fraction form
    831.04/1,246.56 = 368.70/x
  3. Step 3: Cross multiply
    831.04x = 1,246.56 × 368.70
  4. Step 4: Simplify right side
    831.04x = 459,607.63
  5. Step 5: Solve for x
    x = 459,607.63/831.04
  6. Step 6: Final answer
    x = 553.05

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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.