Home / 865,009,589.02-1,297,126,427.95-515,420,394.64

Finding the Fourth Proportional to 865,009,589.02, 1,297,126,427.95 and 515,420,394.64

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Solution

The fourth proportional to 865,009,589.02, 1,297,126,427.95 and 515,420,394.64 is: 772,899,426.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,009,589.02 : 1,297,126,427.95 = 515,420,394.64 : x
  2. Step 2: Convert to fraction form
    865,009,589.02/1,297,126,427.95 = 515,420,394.64/x
  3. Step 3: Cross multiply
    865,009,589.02x = 1,297,126,427.95 × 515,420,394.64
  4. Step 4: Simplify right side
    865,009,589.02x = 668,565,415,391,962,496
  5. Step 5: Solve for x
    x = 668,565,415,391,962,496/865,009,589.02
  6. Step 6: Final answer
    x = 772,899,426.64

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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.