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Finding the Fourth Proportional to 666,211.68, 919,113.88 and 424,450.96

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Solution

The fourth proportional to 666,211.68, 919,113.88 and 424,450.96 is: 585,577.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,211.68 : 919,113.88 = 424,450.96 : x
  2. Step 2: Convert to fraction form
    666,211.68/919,113.88 = 424,450.96/x
  3. Step 3: Cross multiply
    666,211.68x = 919,113.88 × 424,450.96
  4. Step 4: Simplify right side
    666,211.68x = 390,118,768,715.33
  5. Step 5: Solve for x
    x = 390,118,768,715.33/666,211.68
  6. Step 6: Final answer
    x = 585,577.80

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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.