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Finding the Fourth Proportional to 305,923.80, 458,885.70 and 139,711.80

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Solution

The fourth proportional to 305,923.80, 458,885.70 and 139,711.80 is: 209,567.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,923.80 : 458,885.70 = 139,711.80 : x
  2. Step 2: Convert to fraction form
    305,923.80/458,885.70 = 139,711.80/x
  3. Step 3: Cross multiply
    305,923.80x = 458,885.70 × 139,711.80
  4. Step 4: Simplify right side
    305,923.80x = 64,111,747,141.26
  5. Step 5: Solve for x
    x = 64,111,747,141.26/305,923.80
  6. Step 6: Final answer
    x = 209,567.70

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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.