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Finding the Fourth Proportional to 708,683.71, 977,955.33 and 418,388.80

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Solution

The fourth proportional to 708,683.71, 977,955.33 and 418,388.80 is: 577,359.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,683.71 : 977,955.33 = 418,388.80 : x
  2. Step 2: Convert to fraction form
    708,683.71/977,955.33 = 418,388.80/x
  3. Step 3: Cross multiply
    708,683.71x = 977,955.33 × 418,388.80
  4. Step 4: Simplify right side
    708,683.71x = 409,165,556,972.30
  5. Step 5: Solve for x
    x = 409,165,556,972.30/708,683.71
  6. Step 6: Final answer
    x = 577,359.90

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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.