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Finding the Fourth Proportional to 1,252,457,877.48, 1,728,692,891.73 and 716,919,986.31

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Solution

The fourth proportional to 1,252,457,877.48, 1,728,692,891.73 and 716,919,986.31 is: 989,521,888.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,252,457,877.48 : 1,728,692,891.73 = 716,919,986.31 : x
  2. Step 2: Convert to fraction form
    1,252,457,877.48/1,728,692,891.73 = 716,919,986.31/x
  3. Step 3: Cross multiply
    1,252,457,877.48x = 1,728,692,891.73 × 716,919,986.31
  4. Step 4: Simplify right side
    1,252,457,877.48x = 1,239,334,484,273,265,920
  5. Step 5: Solve for x
    x = 1,239,334,484,273,265,920/1,252,457,877.48
  6. Step 6: Final answer
    x = 989,521,888.57

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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.