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Finding the Fourth Proportional to 1,128.99, 1,557.98 and 624.82

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Solution

The fourth proportional to 1,128.99, 1,557.98 and 624.82 is: 862.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128.99 : 1,557.98 = 624.82 : x
  2. Step 2: Convert to fraction form
    1,128.99/1,557.98 = 624.82/x
  3. Step 3: Cross multiply
    1,128.99x = 1,557.98 × 624.82
  4. Step 4: Simplify right side
    1,128.99x = 973,452.02
  5. Step 5: Solve for x
    x = 973,452.02/1,128.99
  6. Step 6: Final answer
    x = 862.23

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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.