Home / 1,038.24-1,557.22-421.95

Finding the Fourth Proportional to 1,038.24, 1,557.22 and 421.95

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Solution

The fourth proportional to 1,038.24, 1,557.22 and 421.95 is: 632.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,038.24 : 1,557.22 = 421.95 : x
  2. Step 2: Convert to fraction form
    1,038.24/1,557.22 = 421.95/x
  3. Step 3: Cross multiply
    1,038.24x = 1,557.22 × 421.95
  4. Step 4: Simplify right side
    1,038.24x = 657,068.98
  5. Step 5: Solve for x
    x = 657,068.98/1,038.24
  6. Step 6: Final answer
    x = 632.87

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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.