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Finding the Fourth Proportional to 581.36, 872.07 and 289.00

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Solution

The fourth proportional to 581.36, 872.07 and 289.00 is: 433.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.36 : 872.07 = 289.00 : x
  2. Step 2: Convert to fraction form
    581.36/872.07 = 289.00/x
  3. Step 3: Cross multiply
    581.36x = 872.07 × 289.00
  4. Step 4: Simplify right side
    581.36x = 252,030.68
  5. Step 5: Solve for x
    x = 252,030.68/581.36
  6. Step 6: Final answer
    x = 433.52

Related Problems

Find fourth proportional to 290.68, 436.03 and 144.50
Half scale
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Double scale
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Similar ratio
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1.5x scale

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.