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Finding the Fourth Proportional to 1,010,810, 1,393,256.64 and 716,560

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Solution

The fourth proportional to 1,010,810, 1,393,256.64 and 716,560 is: 987,675.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,010,810 : 1,393,256.64 = 716,560 : x
  2. Step 2: Convert to fraction form
    1,010,810/1,393,256.64 = 716,560/x
  3. Step 3: Cross multiply
    1,010,810x = 1,393,256.64 × 716,560
  4. Step 4: Simplify right side
    1,010,810x = 998,351,977,958.40
  5. Step 5: Solve for x
    x = 998,351,977,958.40/1,010,810
  6. Step 6: Final answer
    x = 987,675.21

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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.