Home / 1,055.16-1,581.48-438.08

Finding the Fourth Proportional to 1,055.16, 1,581.48 and 438.08

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Solution

The fourth proportional to 1,055.16, 1,581.48 and 438.08 is: 656.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,055.16 : 1,581.48 = 438.08 : x
  2. Step 2: Convert to fraction form
    1,055.16/1,581.48 = 438.08/x
  3. Step 3: Cross multiply
    1,055.16x = 1,581.48 × 438.08
  4. Step 4: Simplify right side
    1,055.16x = 692,814.76
  5. Step 5: Solve for x
    x = 692,814.76/1,055.16
  6. Step 6: Final answer
    x = 656.60

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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.