Home / 499,142.56-688,621.40-307,823.84

Finding the Fourth Proportional to 499,142.56, 688,621.40 and 307,823.84

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Solution

The fourth proportional to 499,142.56, 688,621.40 and 307,823.84 is: 424,676.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,142.56 : 688,621.40 = 307,823.84 : x
  2. Step 2: Convert to fraction form
    499,142.56/688,621.40 = 307,823.84/x
  3. Step 3: Cross multiply
    499,142.56x = 688,621.40 × 307,823.84
  4. Step 4: Simplify right side
    499,142.56x = 211,974,083,654.18
  5. Step 5: Solve for x
    x = 211,974,083,654.18/499,142.56
  6. Step 6: Final answer
    x = 424,676.44

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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.