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Finding the Fourth Proportional to 257,753.70, 355,690.76 and 143,037.35

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Solution

The fourth proportional to 257,753.70, 355,690.76 and 143,037.35 is: 197,386.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,753.70 : 355,690.76 = 143,037.35 : x
  2. Step 2: Convert to fraction form
    257,753.70/355,690.76 = 143,037.35/x
  3. Step 3: Cross multiply
    257,753.70x = 355,690.76 × 143,037.35
  4. Step 4: Simplify right side
    257,753.70x = 50,877,063,374.67
  5. Step 5: Solve for x
    x = 50,877,063,374.67/257,753.70
  6. Step 6: Final answer
    x = 197,386.36

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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.