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Finding the Fourth Proportional to 637,900.80, 956,851.20 and 438,835.20

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Solution

The fourth proportional to 637,900.80, 956,851.20 and 438,835.20 is: 658,252.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,900.80 : 956,851.20 = 438,835.20 : x
  2. Step 2: Convert to fraction form
    637,900.80/956,851.20 = 438,835.20/x
  3. Step 3: Cross multiply
    637,900.80x = 956,851.20 × 438,835.20
  4. Step 4: Simplify right side
    637,900.80x = 419,899,987,722.24
  5. Step 5: Solve for x
    x = 419,899,987,722.24/637,900.80
  6. Step 6: Final answer
    x = 658,252.80

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Double scale
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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.