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Finding the Fourth Proportional to 298,953,312.30, 448,429,968.45 and 287,474,186.70

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Solution

The fourth proportional to 298,953,312.30, 448,429,968.45 and 287,474,186.70 is: 431,211,280.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,953,312.30 : 448,429,968.45 = 287,474,186.70 : x
  2. Step 2: Convert to fraction form
    298,953,312.30/448,429,968.45 = 287,474,186.70/x
  3. Step 3: Cross multiply
    298,953,312.30x = 448,429,968.45 × 287,474,186.70
  4. Step 4: Simplify right side
    298,953,312.30x = 128,912,040,472,070,400
  5. Step 5: Solve for x
    x = 128,912,040,472,070,400/298,953,312.30
  6. Step 6: Final answer
    x = 431,211,280.05

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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.