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Finding the Fourth Proportional to 617,629.70, 926,444.55 and 428,672.90

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Solution

The fourth proportional to 617,629.70, 926,444.55 and 428,672.90 is: 643,009.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,629.70 : 926,444.55 = 428,672.90 : x
  2. Step 2: Convert to fraction form
    617,629.70/926,444.55 = 428,672.90/x
  3. Step 3: Cross multiply
    617,629.70x = 926,444.55 × 428,672.90
  4. Step 4: Simplify right side
    617,629.70x = 397,141,671,937.70
  5. Step 5: Solve for x
    x = 397,141,671,937.70/617,629.70
  6. Step 6: Final answer
    x = 643,009.35

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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.