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Finding the Fourth Proportional to 255,670.40, 383,678.40 and 143,350.40

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Solution

The fourth proportional to 255,670.40, 383,678.40 and 143,350.40 is: 215,122.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,670.40 : 383,678.40 = 143,350.40 : x
  2. Step 2: Convert to fraction form
    255,670.40/383,678.40 = 143,350.40/x
  3. Step 3: Cross multiply
    255,670.40x = 383,678.40 × 143,350.40
  4. Step 4: Simplify right side
    255,670.40x = 55,000,452,111.36
  5. Step 5: Solve for x
    x = 55,000,452,111.36/255,670.40
  6. Step 6: Final answer
    x = 215,122.49

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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.