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Finding the Fourth Proportional to 807,640.10, 1,210,002.15 and 470,404.70

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Solution

The fourth proportional to 807,640.10, 1,210,002.15 and 470,404.70 is: 704,757.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,640.10 : 1,210,002.15 = 470,404.70 : x
  2. Step 2: Convert to fraction form
    807,640.10/1,210,002.15 = 470,404.70/x
  3. Step 3: Cross multiply
    807,640.10x = 1,210,002.15 × 470,404.70
  4. Step 4: Simplify right side
    807,640.10x = 569,190,698,370.11
  5. Step 5: Solve for x
    x = 569,190,698,370.11/807,640.10
  6. Step 6: Final answer
    x = 704,757.85

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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.