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Finding the Fourth Proportional to 1,106.98, 1,526.25 and 931.30

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Solution

The fourth proportional to 1,106.98, 1,526.25 and 931.30 is: 1,284.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,106.98 : 1,526.25 = 931.30 : x
  2. Step 2: Convert to fraction form
    1,106.98/1,526.25 = 931.30/x
  3. Step 3: Cross multiply
    1,106.98x = 1,526.25 × 931.30
  4. Step 4: Simplify right side
    1,106.98x = 1,421,396.63
  5. Step 5: Solve for x
    x = 1,421,396.63/1,106.98
  6. Step 6: Final answer
    x = 1,284.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.