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Finding the Fourth Proportional to 610,943.14, 917,085.11 and 485,390.44

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Solution

The fourth proportional to 610,943.14, 917,085.11 and 485,390.44 is: 728,618.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,943.14 : 917,085.11 = 485,390.44 : x
  2. Step 2: Convert to fraction form
    610,943.14/917,085.11 = 485,390.44/x
  3. Step 3: Cross multiply
    610,943.14x = 917,085.11 × 485,390.44
  4. Step 4: Simplify right side
    610,943.14x = 445,144,345,060.35
  5. Step 5: Solve for x
    x = 445,144,345,060.35/610,943.14
  6. Step 6: Final answer
    x = 728,618.29

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1.5x scale

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.