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Finding the Fourth Proportional to 639,063.90, 957,429.45 and 520,091.10

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Solution

The fourth proportional to 639,063.90, 957,429.45 and 520,091.10 is: 779,187.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,063.90 : 957,429.45 = 520,091.10 : x
  2. Step 2: Convert to fraction form
    639,063.90/957,429.45 = 520,091.10/x
  3. Step 3: Cross multiply
    639,063.90x = 957,429.45 × 520,091.10
  4. Step 4: Simplify right side
    639,063.90x = 497,950,535,822.90
  5. Step 5: Solve for x
    x = 497,950,535,822.90/639,063.90
  6. Step 6: Final answer
    x = 779,187.40

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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.