Home / 1,040.31-1,445.13-1,030.32

Finding the Fourth Proportional to 1,040.31, 1,445.13 and 1,030.32

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Solution

The fourth proportional to 1,040.31, 1,445.13 and 1,030.32 is: 1,431.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.31 : 1,445.13 = 1,030.32 : x
  2. Step 2: Convert to fraction form
    1,040.31/1,445.13 = 1,030.32/x
  3. Step 3: Cross multiply
    1,040.31x = 1,445.13 × 1,030.32
  4. Step 4: Simplify right side
    1,040.31x = 1,488,946.34
  5. Step 5: Solve for x
    x = 1,488,946.34/1,040.31
  6. Step 6: Final answer
    x = 1,431.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.