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Finding the Fourth Proportional to 1,140.64, 1,710.90 and 371.08

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Solution

The fourth proportional to 1,140.64, 1,710.90 and 371.08 is: 556.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.64 : 1,710.90 = 371.08 : x
  2. Step 2: Convert to fraction form
    1,140.64/1,710.90 = 371.08/x
  3. Step 3: Cross multiply
    1,140.64x = 1,710.90 × 371.08
  4. Step 4: Simplify right side
    1,140.64x = 634,880.77
  5. Step 5: Solve for x
    x = 634,880.77/1,140.64
  6. Step 6: Final answer
    x = 556.60

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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.