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Finding the Fourth Proportional to 801.74, 1,106.58 and 507.40

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Solution

The fourth proportional to 801.74, 1,106.58 and 507.40 is: 700.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.74 : 1,106.58 = 507.40 : x
  2. Step 2: Convert to fraction form
    801.74/1,106.58 = 507.40/x
  3. Step 3: Cross multiply
    801.74x = 1,106.58 × 507.40
  4. Step 4: Simplify right side
    801.74x = 561,476.16
  5. Step 5: Solve for x
    x = 561,476.16/801.74
  6. Step 6: Final answer
    x = 700.32

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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.