Home / 1,030.08-1,541.40-639.74

Finding the Fourth Proportional to 1,030.08, 1,541.40 and 639.74

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Solution

The fourth proportional to 1,030.08, 1,541.40 and 639.74 is: 957.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,030.08 : 1,541.40 = 639.74 : x
  2. Step 2: Convert to fraction form
    1,030.08/1,541.40 = 639.74/x
  3. Step 3: Cross multiply
    1,030.08x = 1,541.40 × 639.74
  4. Step 4: Simplify right side
    1,030.08x = 986,095.24
  5. Step 5: Solve for x
    x = 986,095.24/1,030.08
  6. Step 6: Final answer
    x = 957.30

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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.