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Finding the Fourth Proportional to 499,898.67, 689,142.51 and 356,409.60

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Solution

The fourth proportional to 499,898.67, 689,142.51 and 356,409.60 is: 491,333.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,898.67 : 689,142.51 = 356,409.60 : x
  2. Step 2: Convert to fraction form
    499,898.67/689,142.51 = 356,409.60/x
  3. Step 3: Cross multiply
    499,898.67x = 689,142.51 × 356,409.60
  4. Step 4: Simplify right side
    499,898.67x = 245,617,006,332.10
  5. Step 5: Solve for x
    x = 245,617,006,332.10/499,898.67
  6. Step 6: Final answer
    x = 491,333.59

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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.