Home / 1,011.90-1,515.45-623.10

Finding the Fourth Proportional to 1,011.90, 1,515.45 and 623.10

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Solution

The fourth proportional to 1,011.90, 1,515.45 and 623.10 is: 933.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.90 : 1,515.45 = 623.10 : x
  2. Step 2: Convert to fraction form
    1,011.90/1,515.45 = 623.10/x
  3. Step 3: Cross multiply
    1,011.90x = 1,515.45 × 623.10
  4. Step 4: Simplify right side
    1,011.90x = 944,276.90
  5. Step 5: Solve for x
    x = 944,276.90/1,011.90
  6. Step 6: Final answer
    x = 933.17

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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.