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Finding the Fourth Proportional to 1,247.35, 1,870.37 and 554.23

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Solution

The fourth proportional to 1,247.35, 1,870.37 and 554.23 is: 831.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247.35 : 1,870.37 = 554.23 : x
  2. Step 2: Convert to fraction form
    1,247.35/1,870.37 = 554.23/x
  3. Step 3: Cross multiply
    1,247.35x = 1,870.37 × 554.23
  4. Step 4: Simplify right side
    1,247.35x = 1,036,605.81
  5. Step 5: Solve for x
    x = 1,036,605.81/1,247.35
  6. Step 6: Final answer
    x = 831.05

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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.