Home / 631,864,839.70-871,968,720.50-353,406,376.90

Finding the Fourth Proportional to 631,864,839.70, 871,968,720.50 and 353,406,376.90

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Solution

The fourth proportional to 631,864,839.70, 871,968,720.50 and 353,406,376.90 is: 487,698,138.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,864,839.70 : 871,968,720.50 = 353,406,376.90 : x
  2. Step 2: Convert to fraction form
    631,864,839.70/871,968,720.50 = 353,406,376.90/x
  3. Step 3: Cross multiply
    631,864,839.70x = 871,968,720.50 × 353,406,376.90
  4. Step 4: Simplify right side
    631,864,839.70x = 308,159,306,280,266,688
  5. Step 5: Solve for x
    x = 308,159,306,280,266,688/631,864,839.70
  6. Step 6: Final answer
    x = 487,698,138.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.