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Finding the Fourth Proportional to 581.70, 870.95 and 453.70

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Solution

The fourth proportional to 581.70, 870.95 and 453.70 is: 679.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.70 : 870.95 = 453.70 : x
  2. Step 2: Convert to fraction form
    581.70/870.95 = 453.70/x
  3. Step 3: Cross multiply
    581.70x = 870.95 × 453.70
  4. Step 4: Simplify right side
    581.70x = 395,150.02
  5. Step 5: Solve for x
    x = 395,150.02/581.70
  6. Step 6: Final answer
    x = 679.30

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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.