Home / 1,055.60-1,583.28-439.40

Finding the Fourth Proportional to 1,055.60, 1,583.28 and 439.40

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Solution

The fourth proportional to 1,055.60, 1,583.28 and 439.40 is: 659.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,055.60 : 1,583.28 = 439.40 : x
  2. Step 2: Convert to fraction form
    1,055.60/1,583.28 = 439.40/x
  3. Step 3: Cross multiply
    1,055.60x = 1,583.28 × 439.40
  4. Step 4: Simplify right side
    1,055.60x = 695,693.23
  5. Step 5: Solve for x
    x = 695,693.23/1,055.60
  6. Step 6: Final answer
    x = 659.05

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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.