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Finding the Fourth Proportional to 841.02, 1,160.82 and 561.72

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Solution

The fourth proportional to 841.02, 1,160.82 and 561.72 is: 775.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.02 : 1,160.82 = 561.72 : x
  2. Step 2: Convert to fraction form
    841.02/1,160.82 = 561.72/x
  3. Step 3: Cross multiply
    841.02x = 1,160.82 × 561.72
  4. Step 4: Simplify right side
    841.02x = 652,055.81
  5. Step 5: Solve for x
    x = 652,055.81/841.02
  6. Step 6: Final answer
    x = 775.32

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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.