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Finding the Fourth Proportional to 667,812.90, 922,803.93 and 486,209.64

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Solution

The fourth proportional to 667,812.90, 922,803.93 and 486,209.64 is: 671,859.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,812.90 : 922,803.93 = 486,209.64 : x
  2. Step 2: Convert to fraction form
    667,812.90/922,803.93 = 486,209.64/x
  3. Step 3: Cross multiply
    667,812.90x = 922,803.93 × 486,209.64
  4. Step 4: Simplify right side
    667,812.90x = 448,676,166,595.89
  5. Step 5: Solve for x
    x = 448,676,166,595.89/667,812.90
  6. Step 6: Final answer
    x = 671,859.09

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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.