Home / 1,108.18-1,528.74-665.98

Finding the Fourth Proportional to 1,108.18, 1,528.74 and 665.98

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Solution

The fourth proportional to 1,108.18, 1,528.74 and 665.98 is: 918.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,108.18 : 1,528.74 = 665.98 : x
  2. Step 2: Convert to fraction form
    1,108.18/1,528.74 = 665.98/x
  3. Step 3: Cross multiply
    1,108.18x = 1,528.74 × 665.98
  4. Step 4: Simplify right side
    1,108.18x = 1,018,110.27
  5. Step 5: Solve for x
    x = 1,018,110.27/1,108.18
  6. Step 6: Final answer
    x = 918.72

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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.