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Finding the Fourth Proportional to 291,698.20, 437,547.30 and 279,256.60

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Solution

The fourth proportional to 291,698.20, 437,547.30 and 279,256.60 is: 418,884.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,698.20 : 437,547.30 = 279,256.60 : x
  2. Step 2: Convert to fraction form
    291,698.20/437,547.30 = 279,256.60/x
  3. Step 3: Cross multiply
    291,698.20x = 437,547.30 × 279,256.60
  4. Step 4: Simplify right side
    291,698.20x = 122,187,971,337.18
  5. Step 5: Solve for x
    x = 122,187,971,337.18/291,698.20
  6. Step 6: Final answer
    x = 418,884.90

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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.