Home / 865,009,588.77-1,297,126,427.58-515,420,394.39

Finding the Fourth Proportional to 865,009,588.77, 1,297,126,427.58 and 515,420,394.39

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Solution

The fourth proportional to 865,009,588.77, 1,297,126,427.58 and 515,420,394.39 is: 772,899,426.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,009,588.77 : 1,297,126,427.58 = 515,420,394.39 : x
  2. Step 2: Convert to fraction form
    865,009,588.77/1,297,126,427.58 = 515,420,394.39/x
  3. Step 3: Cross multiply
    865,009,588.77x = 1,297,126,427.58 × 515,420,394.39
  4. Step 4: Simplify right side
    865,009,588.77x = 668,565,414,876,975,360
  5. Step 5: Solve for x
    x = 668,565,414,876,975,360/865,009,588.77
  6. Step 6: Final answer
    x = 772,899,426.27

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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.