Home / 491,464.20-678,056.88-400,663.56

Finding the Fourth Proportional to 491,464.20, 678,056.88 and 400,663.56

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Solution

The fourth proportional to 491,464.20, 678,056.88 and 400,663.56 is: 552,782.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,464.20 : 678,056.88 = 400,663.56 : x
  2. Step 2: Convert to fraction form
    491,464.20/678,056.88 = 400,663.56/x
  3. Step 3: Cross multiply
    491,464.20x = 678,056.88 × 400,663.56
  4. Step 4: Simplify right side
    491,464.20x = 271,672,683,423.29
  5. Step 5: Solve for x
    x = 271,672,683,423.29/491,464.20
  6. Step 6: Final answer
    x = 552,782.24

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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.