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Finding the Fourth Proportional to 517,890.22, 776,779.98 and 138,848.98

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Solution

The fourth proportional to 517,890.22, 776,779.98 and 138,848.98 is: 208,258.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    517,890.22 : 776,779.98 = 138,848.98 : x
  2. Step 2: Convert to fraction form
    517,890.22/776,779.98 = 138,848.98/x
  3. Step 3: Cross multiply
    517,890.22x = 776,779.98 × 138,848.98
  4. Step 4: Simplify right side
    517,890.22x = 107,855,107,907.42
  5. Step 5: Solve for x
    x = 107,855,107,907.42/517,890.22
  6. Step 6: Final answer
    x = 208,258.63

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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.