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Finding the Fourth Proportional to 298,953,335.80, 448,430,003.70 and 287,474,210.20

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Solution

The fourth proportional to 298,953,335.80, 448,430,003.70 and 287,474,210.20 is: 431,211,315.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,953,335.80 : 448,430,003.70 = 287,474,210.20 : x
  2. Step 2: Convert to fraction form
    298,953,335.80/448,430,003.70 = 287,474,210.20/x
  3. Step 3: Cross multiply
    298,953,335.80x = 448,430,003.70 × 287,474,210.20
  4. Step 4: Simplify right side
    298,953,335.80x = 128,912,061,143,640,576
  5. Step 5: Solve for x
    x = 128,912,061,143,640,576/298,953,335.80
  6. Step 6: Final answer
    x = 431,211,315.30

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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.