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Finding the Fourth Proportional to 617,426.40, 926,722.80 and 381,230.40

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Solution

The fourth proportional to 617,426.40, 926,722.80 and 381,230.40 is: 572,205.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,426.40 : 926,722.80 = 381,230.40 : x
  2. Step 2: Convert to fraction form
    617,426.40/926,722.80 = 381,230.40/x
  3. Step 3: Cross multiply
    617,426.40x = 926,722.80 × 381,230.40
  4. Step 4: Simplify right side
    617,426.40x = 353,294,903,733.12
  5. Step 5: Solve for x
    x = 353,294,903,733.12/617,426.40
  6. Step 6: Final answer
    x = 572,205.70

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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.