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Finding the Fourth Proportional to 841.37, 1,159.89 and 561.51

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Solution

The fourth proportional to 841.37, 1,159.89 and 561.51 is: 774.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.37 : 1,159.89 = 561.51 : x
  2. Step 2: Convert to fraction form
    841.37/1,159.89 = 561.51/x
  3. Step 3: Cross multiply
    841.37x = 1,159.89 × 561.51
  4. Step 4: Simplify right side
    841.37x = 651,289.83
  5. Step 5: Solve for x
    x = 651,289.83/841.37
  6. Step 6: Final answer
    x = 774.08

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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.