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Finding the Fourth Proportional to 421,134,851.70, 631,702,277.55 and 421,134,851.70

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Solution

The fourth proportional to 421,134,851.70, 631,702,277.55 and 421,134,851.70 is: 631,702,277.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,134,851.70 : 631,702,277.55 = 421,134,851.70 : x
  2. Step 2: Convert to fraction form
    421,134,851.70/631,702,277.55 = 421,134,851.70/x
  3. Step 3: Cross multiply
    421,134,851.70x = 631,702,277.55 × 421,134,851.70
  4. Step 4: Simplify right side
    421,134,851.70x = 266,031,844,974,571,456
  5. Step 5: Solve for x
    x = 266,031,844,974,571,456/421,134,851.70
  6. Step 6: Final answer
    x = 631,702,277.55

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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.