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Finding the Fourth Proportional to 1,124.95, 1,681.88 and 953.53

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Solution

The fourth proportional to 1,124.95, 1,681.88 and 953.53 is: 1,425.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,124.95 : 1,681.88 = 953.53 : x
  2. Step 2: Convert to fraction form
    1,124.95/1,681.88 = 953.53/x
  3. Step 3: Cross multiply
    1,124.95x = 1,681.88 × 953.53
  4. Step 4: Simplify right side
    1,124.95x = 1,603,720.37
  5. Step 5: Solve for x
    x = 1,603,720.37/1,124.95
  6. Step 6: Final answer
    x = 1,425.60

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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.