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Finding the Fourth Proportional to 1,539.86, 2,124.93 and 841.22

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Solution

The fourth proportional to 1,539.86, 2,124.93 and 841.22 is: 1,160.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.86 : 2,124.93 = 841.22 : x
  2. Step 2: Convert to fraction form
    1,539.86/2,124.93 = 841.22/x
  3. Step 3: Cross multiply
    1,539.86x = 2,124.93 × 841.22
  4. Step 4: Simplify right side
    1,539.86x = 1,787,533.61
  5. Step 5: Solve for x
    x = 1,787,533.61/1,539.86
  6. Step 6: Final answer
    x = 1,160.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.