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Finding the Fourth Proportional to 383,775.40, 575,144.70 and 257,055.40

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Solution

The fourth proportional to 383,775.40, 575,144.70 and 257,055.40 is: 385,235.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,775.40 : 575,144.70 = 257,055.40 : x
  2. Step 2: Convert to fraction form
    383,775.40/575,144.70 = 257,055.40/x
  3. Step 3: Cross multiply
    383,775.40x = 575,144.70 × 257,055.40
  4. Step 4: Simplify right side
    383,775.40x = 147,844,050,916.38
  5. Step 5: Solve for x
    x = 147,844,050,916.38/383,775.40
  6. Step 6: Final answer
    x = 385,235.87

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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.