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Finding the Fourth Proportional to 645,912, 969,065.28 and 330,592.32

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Solution

The fourth proportional to 645,912, 969,065.28 and 330,592.32 is: 495,989.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,912 : 969,065.28 = 330,592.32 : x
  2. Step 2: Convert to fraction form
    645,912/969,065.28 = 330,592.32/x
  3. Step 3: Cross multiply
    645,912x = 969,065.28 × 330,592.32
  4. Step 4: Simplify right side
    645,912x = 320,365,539,146.65
  5. Step 5: Solve for x
    x = 320,365,539,146.65/645,912
  6. Step 6: Final answer
    x = 495,989.45

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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.