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Finding the Fourth Proportional to 355,015.18, 532,779.66 and 138,905.88

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Solution

The fourth proportional to 355,015.18, 532,779.66 and 138,905.88 is: 208,459.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,015.18 : 532,779.66 = 138,905.88 : x
  2. Step 2: Convert to fraction form
    355,015.18/532,779.66 = 138,905.88/x
  3. Step 3: Cross multiply
    355,015.18x = 532,779.66 × 138,905.88
  4. Step 4: Simplify right side
    355,015.18x = 74,006,227,518.40
  5. Step 5: Solve for x
    x = 74,006,227,518.40/355,015.18
  6. Step 6: Final answer
    x = 208,459.33

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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.