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Finding the Fourth Proportional to 1,870.42, 2,805.64 and 554.19

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Solution

The fourth proportional to 1,870.42, 2,805.64 and 554.19 is: 831.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,870.42 : 2,805.64 = 554.19 : x
  2. Step 2: Convert to fraction form
    1,870.42/2,805.64 = 554.19/x
  3. Step 3: Cross multiply
    1,870.42x = 2,805.64 × 554.19
  4. Step 4: Simplify right side
    1,870.42x = 1,554,861.51
  5. Step 5: Solve for x
    x = 1,554,861.51/1,870.42
  6. Step 6: Final answer
    x = 831.29

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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.