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Finding the Fourth Proportional to 520,064.70, 779,578.65 and 239,091.90

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Solution

The fourth proportional to 520,064.70, 779,578.65 and 239,091.90 is: 358,399.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,064.70 : 779,578.65 = 239,091.90 : x
  2. Step 2: Convert to fraction form
    520,064.70/779,578.65 = 239,091.90/x
  3. Step 3: Cross multiply
    520,064.70x = 779,578.65 × 239,091.90
  4. Step 4: Simplify right side
    520,064.70x = 186,390,940,627.94
  5. Step 5: Solve for x
    x = 186,390,940,627.94/520,064.70
  6. Step 6: Final answer
    x = 358,399.52

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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.