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Finding the Fourth Proportional to 486,497.50, 670,997.09 and 418,628.21

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Solution

The fourth proportional to 486,497.50, 670,997.09 and 418,628.21 is: 577,389.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,497.50 : 670,997.09 = 418,628.21 : x
  2. Step 2: Convert to fraction form
    486,497.50/670,997.09 = 418,628.21/x
  3. Step 3: Cross multiply
    486,497.50x = 670,997.09 × 418,628.21
  4. Step 4: Simplify right side
    486,497.50x = 280,898,308,393.49
  5. Step 5: Solve for x
    x = 280,898,308,393.49/486,497.50
  6. Step 6: Final answer
    x = 577,389.01

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1.5x scale

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.