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Finding the Fourth Proportional to 3,939,611.88, 5,909,417.90 and 947,795.88

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Solution

The fourth proportional to 3,939,611.88, 5,909,417.90 and 947,795.88 is: 1,421,693.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939,611.88 : 5,909,417.90 = 947,795.88 : x
  2. Step 2: Convert to fraction form
    3,939,611.88/5,909,417.90 = 947,795.88/x
  3. Step 3: Cross multiply
    3,939,611.88x = 5,909,417.90 × 947,795.88
  4. Step 4: Simplify right side
    3,939,611.88x = 5,600,921,938,818.25
  5. Step 5: Solve for x
    x = 5,600,921,938,818.25/3,939,611.88
  6. Step 6: Final answer
    x = 1,421,693.84

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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.