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Finding the Fourth Proportional to 1,017.78, 1,525.98 and 368.43

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Solution

The fourth proportional to 1,017.78, 1,525.98 and 368.43 is: 552.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,017.78 : 1,525.98 = 368.43 : x
  2. Step 2: Convert to fraction form
    1,017.78/1,525.98 = 368.43/x
  3. Step 3: Cross multiply
    1,017.78x = 1,525.98 × 368.43
  4. Step 4: Simplify right side
    1,017.78x = 562,216.81
  5. Step 5: Solve for x
    x = 562,216.81/1,017.78
  6. Step 6: Final answer
    x = 552.40

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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.