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Finding the Fourth Proportional to 646,575.90, 892,239.66 and 356,130.96

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Solution

The fourth proportional to 646,575.90, 892,239.66 and 356,130.96 is: 491,441.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,575.90 : 892,239.66 = 356,130.96 : x
  2. Step 2: Convert to fraction form
    646,575.90/892,239.66 = 356,130.96/x
  3. Step 3: Cross multiply
    646,575.90x = 892,239.66 × 356,130.96
  4. Step 4: Simplify right side
    646,575.90x = 317,754,166,665.87
  5. Step 5: Solve for x
    x = 317,754,166,665.87/646,575.90
  6. Step 6: Final answer
    x = 491,441.40

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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.