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Finding the Fourth Proportional to 688,043.50, 949,639.72 and 397,667.40

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Solution

The fourth proportional to 688,043.50, 949,639.72 and 397,667.40 is: 548,861.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,043.50 : 949,639.72 = 397,667.40 : x
  2. Step 2: Convert to fraction form
    688,043.50/949,639.72 = 397,667.40/x
  3. Step 3: Cross multiply
    688,043.50x = 949,639.72 × 397,667.40
  4. Step 4: Simplify right side
    688,043.50x = 377,640,758,389.13
  5. Step 5: Solve for x
    x = 377,640,758,389.13/688,043.50
  6. Step 6: Final answer
    x = 548,861.75

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1.5x scale

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.