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Finding the Fourth Proportional to 257,868.84, 355,853.39 and 143,140.84

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Solution

The fourth proportional to 257,868.84, 355,853.39 and 143,140.84 is: 197,531.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,868.84 : 355,853.39 = 143,140.84 : x
  2. Step 2: Convert to fraction form
    257,868.84/355,853.39 = 143,140.84/x
  3. Step 3: Cross multiply
    257,868.84x = 355,853.39 × 143,140.84
  4. Step 4: Simplify right side
    257,868.84x = 50,937,153,161.45
  5. Step 5: Solve for x
    x = 50,937,153,161.45/257,868.84
  6. Step 6: Final answer
    x = 197,531.25

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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.