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Finding the Fourth Proportional to 291,421.69, 436,873.20 and 113,888.32

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Solution

The fourth proportional to 291,421.69, 436,873.20 and 113,888.32 is: 170,731.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,421.69 : 436,873.20 = 113,888.32 : x
  2. Step 2: Convert to fraction form
    291,421.69/436,873.20 = 113,888.32/x
  3. Step 3: Cross multiply
    291,421.69x = 436,873.20 × 113,888.32
  4. Step 4: Simplify right side
    291,421.69x = 49,754,754,801.02
  5. Step 5: Solve for x
    x = 49,754,754,801.02/291,421.69
  6. Step 6: Final answer
    x = 170,731.13

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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.