Home / 428,466,014.84-642,902,127.12-207,013,217.90

Finding the Fourth Proportional to 428,466,014.84, 642,902,127.12 and 207,013,217.90

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Solution

The fourth proportional to 428,466,014.84, 642,902,127.12 and 207,013,217.90 is: 310,617,956.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,466,014.84 : 642,902,127.12 = 207,013,217.90 : x
  2. Step 2: Convert to fraction form
    428,466,014.84/642,902,127.12 = 207,013,217.90/x
  3. Step 3: Cross multiply
    428,466,014.84x = 642,902,127.12 × 207,013,217.90
  4. Step 4: Simplify right side
    428,466,014.84x = 133,089,238,126,651,552
  5. Step 5: Solve for x
    x = 133,089,238,126,651,552/428,466,014.84
  6. Step 6: Final answer
    x = 310,617,956.89

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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.