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Finding the Fourth Proportional to 1,038.75, 1,433.58 and 573.09

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Solution

The fourth proportional to 1,038.75, 1,433.58 and 573.09 is: 790.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,038.75 : 1,433.58 = 573.09 : x
  2. Step 2: Convert to fraction form
    1,038.75/1,433.58 = 573.09/x
  3. Step 3: Cross multiply
    1,038.75x = 1,433.58 × 573.09
  4. Step 4: Simplify right side
    1,038.75x = 821,570.36
  5. Step 5: Solve for x
    x = 821,570.36/1,038.75
  6. Step 6: Final answer
    x = 790.92

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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.