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Finding the Fourth Proportional to 475,136.46, 655,386.26 and 311,803.56

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Solution

The fourth proportional to 475,136.46, 655,386.26 and 311,803.56 is: 430,090.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    475,136.46 : 655,386.26 = 311,803.56 : x
  2. Step 2: Convert to fraction form
    475,136.46/655,386.26 = 311,803.56/x
  3. Step 3: Cross multiply
    475,136.46x = 655,386.26 × 311,803.56
  4. Step 4: Simplify right side
    475,136.46x = 204,351,767,484.07
  5. Step 5: Solve for x
    x = 204,351,767,484.07/475,136.46
  6. Step 6: Final answer
    x = 430,090.69

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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.