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Finding the Fourth Proportional to 666,525.51, 919,915.25 and 408,545.98

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Solution

The fourth proportional to 666,525.51, 919,915.25 and 408,545.98 is: 563,860.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,525.51 : 919,915.25 = 408,545.98 : x
  2. Step 2: Convert to fraction form
    666,525.51/919,915.25 = 408,545.98/x
  3. Step 3: Cross multiply
    666,525.51x = 919,915.25 × 408,545.98
  4. Step 4: Simplify right side
    666,525.51x = 375,827,672,985.68
  5. Step 5: Solve for x
    x = 375,827,672,985.68/666,525.51
  6. Step 6: Final answer
    x = 563,860.90

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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.