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Finding the Fourth Proportional to 558,478.39, 770,703.53 and 303,831.40

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Solution

The fourth proportional to 558,478.39, 770,703.53 and 303,831.40 is: 419,289.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,478.39 : 770,703.53 = 303,831.40 : x
  2. Step 2: Convert to fraction form
    558,478.39/770,703.53 = 303,831.40/x
  3. Step 3: Cross multiply
    558,478.39x = 770,703.53 × 303,831.40
  4. Step 4: Simplify right side
    558,478.39x = 234,163,934,227.80
  5. Step 5: Solve for x
    x = 234,163,934,227.80/558,478.39
  6. Step 6: Final answer
    x = 419,289.16

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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.