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Finding the Fourth Proportional to 666,485.22, 918,792.90 and 475,166.46

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Solution

The fourth proportional to 666,485.22, 918,792.90 and 475,166.46 is: 655,047.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,485.22 : 918,792.90 = 475,166.46 : x
  2. Step 2: Convert to fraction form
    666,485.22/918,792.90 = 475,166.46/x
  3. Step 3: Cross multiply
    666,485.22x = 918,792.90 × 475,166.46
  4. Step 4: Simplify right side
    666,485.22x = 436,579,569,766.13
  5. Step 5: Solve for x
    x = 436,579,569,766.13/666,485.22
  6. Step 6: Final answer
    x = 655,047.64

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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.