Home / 515,784.77-772,761.85-215,603.63

Finding the Fourth Proportional to 515,784.77, 772,761.85 and 215,603.63

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Solution

The fourth proportional to 515,784.77, 772,761.85 and 215,603.63 is: 323,022.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,784.77 : 772,761.85 = 215,603.63 : x
  2. Step 2: Convert to fraction form
    515,784.77/772,761.85 = 215,603.63/x
  3. Step 3: Cross multiply
    515,784.77x = 772,761.85 × 215,603.63
  4. Step 4: Simplify right side
    515,784.77x = 166,610,259,985.52
  5. Step 5: Solve for x
    x = 166,610,259,985.52/515,784.77
  6. Step 6: Final answer
    x = 323,022.84

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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.