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Finding the Fourth Proportional to 1,011.42, 1,518.75 and 946.62

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Solution

The fourth proportional to 1,011.42, 1,518.75 and 946.62 is: 1,421.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.42 : 1,518.75 = 946.62 : x
  2. Step 2: Convert to fraction form
    1,011.42/1,518.75 = 946.62/x
  3. Step 3: Cross multiply
    1,011.42x = 1,518.75 × 946.62
  4. Step 4: Simplify right side
    1,011.42x = 1,437,679.13
  5. Step 5: Solve for x
    x = 1,437,679.13/1,011.42
  6. Step 6: Final answer
    x = 1,421.45

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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.