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Finding the Fourth Proportional to 479,719, 662,070.54 and 278,515

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Solution

The fourth proportional to 479,719, 662,070.54 and 278,515 is: 384,384.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,719 : 662,070.54 = 278,515 : x
  2. Step 2: Convert to fraction form
    479,719/662,070.54 = 278,515/x
  3. Step 3: Cross multiply
    479,719x = 662,070.54 × 278,515
  4. Step 4: Simplify right side
    479,719x = 184,396,576,448.10
  5. Step 5: Solve for x
    x = 184,396,576,448.10/479,719
  6. Step 6: Final answer
    x = 384,384.56

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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.