Home / 939,290,592.72-1,296,236,629.74-515,943,399.36

Finding the Fourth Proportional to 939,290,592.72, 1,296,236,629.74 and 515,943,399.36

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Solution

The fourth proportional to 939,290,592.72, 1,296,236,629.74 and 515,943,399.36 is: 712,010,466.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    939,290,592.72 : 1,296,236,629.74 = 515,943,399.36 : x
  2. Step 2: Convert to fraction form
    939,290,592.72/1,296,236,629.74 = 515,943,399.36/x
  3. Step 3: Cross multiply
    939,290,592.72x = 1,296,236,629.74 × 515,943,399.36
  4. Step 4: Simplify right side
    939,290,592.72x = 668,784,733,123,005,312
  5. Step 5: Solve for x
    x = 668,784,733,123,005,312/939,290,592.72
  6. Step 6: Final answer
    x = 712,010,466.52

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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.