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Finding the Fourth Proportional to 515,085.84, 772,841.34 and 278,149.52

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Solution

The fourth proportional to 515,085.84, 772,841.34 and 278,149.52 is: 417,339.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,085.84 : 772,841.34 = 278,149.52 : x
  2. Step 2: Convert to fraction form
    515,085.84/772,841.34 = 278,149.52/x
  3. Step 3: Cross multiply
    515,085.84x = 772,841.34 × 278,149.52
  4. Step 4: Simplify right side
    515,085.84x = 214,965,447,757.16
  5. Step 5: Solve for x
    x = 214,965,447,757.16/515,085.84
  6. Step 6: Final answer
    x = 417,339.07

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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.