Home / 1,285.39-1,929.01-555.49

Finding the Fourth Proportional to 1,285.39, 1,929.01 and 555.49

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Solution

The fourth proportional to 1,285.39, 1,929.01 and 555.49 is: 833.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.39 : 1,929.01 = 555.49 : x
  2. Step 2: Convert to fraction form
    1,285.39/1,929.01 = 555.49/x
  3. Step 3: Cross multiply
    1,285.39x = 1,929.01 × 555.49
  4. Step 4: Simplify right side
    1,285.39x = 1,071,539.55
  5. Step 5: Solve for x
    x = 1,071,539.55/1,285.39
  6. Step 6: Final answer
    x = 833.63

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1.5x scale

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.