Home / 777,418.76-1,072,521.88-515,897.40

Finding the Fourth Proportional to 777,418.76, 1,072,521.88 and 515,897.40

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Solution

The fourth proportional to 777,418.76, 1,072,521.88 and 515,897.40 is: 711,728.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    777,418.76 : 1,072,521.88 = 515,897.40 : x
  2. Step 2: Convert to fraction form
    777,418.76/1,072,521.88 = 515,897.40/x
  3. Step 3: Cross multiply
    777,418.76x = 1,072,521.88 × 515,897.40
  4. Step 4: Simplify right side
    777,418.76x = 553,311,252,067.33
  5. Step 5: Solve for x
    x = 553,311,252,067.33/777,418.76
  6. Step 6: Final answer
    x = 711,728.71

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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.