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Finding the Fourth Proportional to 1,325.90, 1,988.55 and 504.16

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Solution

The fourth proportional to 1,325.90, 1,988.55 and 504.16 is: 756.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.90 : 1,988.55 = 504.16 : x
  2. Step 2: Convert to fraction form
    1,325.90/1,988.55 = 504.16/x
  3. Step 3: Cross multiply
    1,325.90x = 1,988.55 × 504.16
  4. Step 4: Simplify right side
    1,325.90x = 1,002,547.37
  5. Step 5: Solve for x
    x = 1,002,547.37/1,325.90
  6. Step 6: Final answer
    x = 756.13

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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.