Home / 772,129.97-1,065,603.20-428,073.86

Finding the Fourth Proportional to 772,129.97, 1,065,603.20 and 428,073.86

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Solution

The fourth proportional to 772,129.97, 1,065,603.20 and 428,073.86 is: 590,777.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    772,129.97 : 1,065,603.20 = 428,073.86 : x
  2. Step 2: Convert to fraction form
    772,129.97/1,065,603.20 = 428,073.86/x
  3. Step 3: Cross multiply
    772,129.97x = 1,065,603.20 × 428,073.86
  4. Step 4: Simplify right side
    772,129.97x = 456,156,875,575.99
  5. Step 5: Solve for x
    x = 456,156,875,575.99/772,129.97
  6. Step 6: Final answer
    x = 590,777.32

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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.