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Finding the Fourth Proportional to 457,246.60, 686,258.70 and 204,915.40

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Solution

The fourth proportional to 457,246.60, 686,258.70 and 204,915.40 is: 307,547.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,246.60 : 686,258.70 = 204,915.40 : x
  2. Step 2: Convert to fraction form
    457,246.60/686,258.70 = 204,915.40/x
  3. Step 3: Cross multiply
    457,246.60x = 686,258.70 × 204,915.40
  4. Step 4: Simplify right side
    457,246.60x = 140,624,976,013.98
  5. Step 5: Solve for x
    x = 140,624,976,013.98/457,246.60
  6. Step 6: Final answer
    x = 307,547.34

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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.