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Finding the Fourth Proportional to 1,038.69, 1,433.37 and 619.24

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Solution

The fourth proportional to 1,038.69, 1,433.37 and 619.24 is: 854.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,038.69 : 1,433.37 = 619.24 : x
  2. Step 2: Convert to fraction form
    1,038.69/1,433.37 = 619.24/x
  3. Step 3: Cross multiply
    1,038.69x = 1,433.37 × 619.24
  4. Step 4: Simplify right side
    1,038.69x = 887,600.04
  5. Step 5: Solve for x
    x = 887,600.04/1,038.69
  6. Step 6: Final answer
    x = 854.54

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1.5x scale

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.