Home / 858,511,979.10-1,288,193,121.45-490,329,654.30

Finding the Fourth Proportional to 858,511,979.10, 1,288,193,121.45 and 490,329,654.30

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Solution

The fourth proportional to 858,511,979.10, 1,288,193,121.45 and 490,329,654.30 is: 735,737,302.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,511,979.10 : 1,288,193,121.45 = 490,329,654.30 : x
  2. Step 2: Convert to fraction form
    858,511,979.10/1,288,193,121.45 = 490,329,654.30/x
  3. Step 3: Cross multiply
    858,511,979.10x = 1,288,193,121.45 × 490,329,654.30
  4. Step 4: Simplify right side
    858,511,979.10x = 631,639,287,912,216,448
  5. Step 5: Solve for x
    x = 631,639,287,912,216,448/858,511,979.10
  6. Step 6: Final answer
    x = 735,737,302.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.