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Finding the Fourth Proportional to 407.00, 561.71 and 283.07

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Solution

The fourth proportional to 407.00, 561.71 and 283.07 is: 390.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.00 : 561.71 = 283.07 : x
  2. Step 2: Convert to fraction form
    407.00/561.71 = 283.07/x
  3. Step 3: Cross multiply
    407.00x = 561.71 × 283.07
  4. Step 4: Simplify right side
    407.00x = 159,005.36
  5. Step 5: Solve for x
    x = 159,005.36/407.00
  6. Step 6: Final answer
    x = 390.67

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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.