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Finding the Fourth Proportional to 305,246.40, 457,869.60 and 139,358.40

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Solution

The fourth proportional to 305,246.40, 457,869.60 and 139,358.40 is: 209,037.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,246.40 : 457,869.60 = 139,358.40 : x
  2. Step 2: Convert to fraction form
    305,246.40/457,869.60 = 139,358.40/x
  3. Step 3: Cross multiply
    305,246.40x = 457,869.60 × 139,358.40
  4. Step 4: Simplify right side
    305,246.40x = 63,807,974,864.64
  5. Step 5: Solve for x
    x = 63,807,974,864.64/305,246.40
  6. Step 6: Final answer
    x = 209,037.60

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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.