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Finding the Fourth Proportional to 661,779.61, 992,575.70 and 212,441.32

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Solution

The fourth proportional to 661,779.61, 992,575.70 and 212,441.32 is: 318,631.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,779.61 : 992,575.70 = 212,441.32 : x
  2. Step 2: Convert to fraction form
    661,779.61/992,575.70 = 212,441.32/x
  3. Step 3: Cross multiply
    661,779.61x = 992,575.70 × 212,441.32
  4. Step 4: Simplify right side
    661,779.61x = 210,864,091,907.92
  5. Step 5: Solve for x
    x = 210,864,091,907.92/661,779.61
  6. Step 6: Final answer
    x = 318,631.90

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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.