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Finding the Fourth Proportional to 869,876,672.80, 1,304,815,009.20 and 482,893,146.40

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Solution

The fourth proportional to 869,876,672.80, 1,304,815,009.20 and 482,893,146.40 is: 724,339,719.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,876,672.80 : 1,304,815,009.20 = 482,893,146.40 : x
  2. Step 2: Convert to fraction form
    869,876,672.80/1,304,815,009.20 = 482,893,146.40/x
  3. Step 3: Cross multiply
    869,876,672.80x = 1,304,815,009.20 × 482,893,146.40
  4. Step 4: Simplify right side
    869,876,672.80x = 630,086,225,262,532,992
  5. Step 5: Solve for x
    x = 630,086,225,262,532,992/869,876,672.80
  6. Step 6: Final answer
    x = 724,339,719.60

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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.