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Finding the Fourth Proportional to 666,744.46, 920,238.51 and 505,317.94

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Solution

The fourth proportional to 666,744.46, 920,238.51 and 505,317.94 is: 697,438.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,744.46 : 920,238.51 = 505,317.94 : x
  2. Step 2: Convert to fraction form
    666,744.46/920,238.51 = 505,317.94/x
  3. Step 3: Cross multiply
    666,744.46x = 920,238.51 × 505,317.94
  4. Step 4: Simplify right side
    666,744.46x = 465,013,028,181.87
  5. Step 5: Solve for x
    x = 465,013,028,181.87/666,744.46
  6. Step 6: Final answer
    x = 697,438.16

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1.5x scale

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.