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Finding the Fourth Proportional to 259,748.80, 389,623.20 and 253,916.80

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Solution

The fourth proportional to 259,748.80, 389,623.20 and 253,916.80 is: 380,875.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,748.80 : 389,623.20 = 253,916.80 : x
  2. Step 2: Convert to fraction form
    259,748.80/389,623.20 = 253,916.80/x
  3. Step 3: Cross multiply
    259,748.80x = 389,623.20 × 253,916.80
  4. Step 4: Simplify right side
    259,748.80x = 98,931,876,149.76
  5. Step 5: Solve for x
    x = 98,931,876,149.76/259,748.80
  6. Step 6: Final answer
    x = 380,875.20

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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.