Home / 1,128.21-1,551.60-1,032.63

Finding the Fourth Proportional to 1,128.21, 1,551.60 and 1,032.63

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Solution

The fourth proportional to 1,128.21, 1,551.60 and 1,032.63 is: 1,420.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128.21 : 1,551.60 = 1,032.63 : x
  2. Step 2: Convert to fraction form
    1,128.21/1,551.60 = 1,032.63/x
  3. Step 3: Cross multiply
    1,128.21x = 1,551.60 × 1,032.63
  4. Step 4: Simplify right side
    1,128.21x = 1,602,228.71
  5. Step 5: Solve for x
    x = 1,602,228.71/1,128.21
  6. Step 6: Final answer
    x = 1,420.15

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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.