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Finding the Fourth Proportional to 1,000.79, 1,501.38 and 384.51

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Solution

The fourth proportional to 1,000.79, 1,501.38 and 384.51 is: 576.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,000.79 : 1,501.38 = 384.51 : x
  2. Step 2: Convert to fraction form
    1,000.79/1,501.38 = 384.51/x
  3. Step 3: Cross multiply
    1,000.79x = 1,501.38 × 384.51
  4. Step 4: Simplify right side
    1,000.79x = 577,295.62
  5. Step 5: Solve for x
    x = 577,295.62/1,000.79
  6. Step 6: Final answer
    x = 576.84

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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.