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Finding the Fourth Proportional to 645,552.90, 890,858.79 and 359,072.10

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Solution

The fourth proportional to 645,552.90, 890,858.79 and 359,072.10 is: 495,517.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,552.90 : 890,858.79 = 359,072.10 : x
  2. Step 2: Convert to fraction form
    645,552.90/890,858.79 = 359,072.10/x
  3. Step 3: Cross multiply
    645,552.90x = 890,858.79 × 359,072.10
  4. Step 4: Simplify right side
    645,552.90x = 319,882,536,528.76
  5. Step 5: Solve for x
    x = 319,882,536,528.76/645,552.90
  6. Step 6: Final answer
    x = 495,517.16

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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.