Home / 1,285.51-1,929.13-555.16

Finding the Fourth Proportional to 1,285.51, 1,929.13 and 555.16

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Solution

The fourth proportional to 1,285.51, 1,929.13 and 555.16 is: 833.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.51 : 1,929.13 = 555.16 : x
  2. Step 2: Convert to fraction form
    1,285.51/1,929.13 = 555.16/x
  3. Step 3: Cross multiply
    1,285.51x = 1,929.13 × 555.16
  4. Step 4: Simplify right side
    1,285.51x = 1,070,969.60
  5. Step 5: Solve for x
    x = 1,070,969.60/1,285.51
  6. Step 6: Final answer
    x = 833.11

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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.