Home / 722,445.76-996,931.20-400,136.68

Finding the Fourth Proportional to 722,445.76, 996,931.20 and 400,136.68

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Solution

The fourth proportional to 722,445.76, 996,931.20 and 400,136.68 is: 552,164.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,445.76 : 996,931.20 = 400,136.68 : x
  2. Step 2: Convert to fraction form
    722,445.76/996,931.20 = 400,136.68/x
  3. Step 3: Cross multiply
    722,445.76x = 996,931.20 × 400,136.68
  4. Step 4: Simplify right side
    722,445.76x = 398,908,740,556.42
  5. Step 5: Solve for x
    x = 398,908,740,556.42/722,445.76
  6. Step 6: Final answer
    x = 552,164.28

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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.