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Finding the Fourth Proportional to 458,955.45, 688,463.55 and 121,991.40

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Solution

The fourth proportional to 458,955.45, 688,463.55 and 121,991.40 is: 182,995.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,955.45 : 688,463.55 = 121,991.40 : x
  2. Step 2: Convert to fraction form
    458,955.45/688,463.55 = 121,991.40/x
  3. Step 3: Cross multiply
    458,955.45x = 688,463.55 × 121,991.40
  4. Step 4: Simplify right side
    458,955.45x = 83,986,632,313.47
  5. Step 5: Solve for x
    x = 83,986,632,313.47/458,955.45
  6. Step 6: Final answer
    x = 182,995.17

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1.5x scale

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.