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Finding the Fourth Proportional to 620,608.32, 856,476 and 467,376.30

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Solution

The fourth proportional to 620,608.32, 856,476 and 467,376.30 is: 645,006.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,608.32 : 856,476 = 467,376.30 : x
  2. Step 2: Convert to fraction form
    620,608.32/856,476 = 467,376.30/x
  3. Step 3: Cross multiply
    620,608.32x = 856,476 × 467,376.30
  4. Step 4: Simplify right side
    620,608.32x = 400,296,583,918.80
  5. Step 5: Solve for x
    x = 400,296,583,918.80/620,608.32
  6. Step 6: Final answer
    x = 645,006.80

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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.