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Finding the Fourth Proportional to 312,779.64, 469,097.50 and 186,455.55

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Solution

The fourth proportional to 312,779.64, 469,097.50 and 186,455.55 is: 279,640.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,779.64 : 469,097.50 = 186,455.55 : x
  2. Step 2: Convert to fraction form
    312,779.64/469,097.50 = 186,455.55/x
  3. Step 3: Cross multiply
    312,779.64x = 469,097.50 × 186,455.55
  4. Step 4: Simplify right side
    312,779.64x = 87,465,832,366.13
  5. Step 5: Solve for x
    x = 87,465,832,366.13/312,779.64
  6. Step 6: Final answer
    x = 279,640.43

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1.5x scale

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.