Home / 718,394.18-991,624.20-428,096.82

Finding the Fourth Proportional to 718,394.18, 991,624.20 and 428,096.82

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Solution

The fourth proportional to 718,394.18, 991,624.20 and 428,096.82 is: 590,916.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,394.18 : 991,624.20 = 428,096.82 : x
  2. Step 2: Convert to fraction form
    718,394.18/991,624.20 = 428,096.82/x
  3. Step 3: Cross multiply
    718,394.18x = 991,624.20 × 428,096.82
  4. Step 4: Simplify right side
    718,394.18x = 424,511,166,655.04
  5. Step 5: Solve for x
    x = 424,511,166,655.04/718,394.18
  6. Step 6: Final answer
    x = 590,916.77

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1.5x scale

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.