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Finding the Fourth Proportional to 499,801.72, 689,008.98 and 356,312.65

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Solution

The fourth proportional to 499,801.72, 689,008.98 and 356,312.65 is: 491,200.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,801.72 : 689,008.98 = 356,312.65 : x
  2. Step 2: Convert to fraction form
    499,801.72/689,008.98 = 356,312.65/x
  3. Step 3: Cross multiply
    499,801.72x = 689,008.98 × 356,312.65
  4. Step 4: Simplify right side
    499,801.72x = 245,502,618,865.44
  5. Step 5: Solve for x
    x = 245,502,618,865.44/499,801.72
  6. Step 6: Final answer
    x = 491,200.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.