Home / 1,318,921.80-1,820,123.64-715,309.80

Finding the Fourth Proportional to 1,318,921.80, 1,820,123.64 and 715,309.80

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Solution

The fourth proportional to 1,318,921.80, 1,820,123.64 and 715,309.80 is: 987,133.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,921.80 : 1,820,123.64 = 715,309.80 : x
  2. Step 2: Convert to fraction form
    1,318,921.80/1,820,123.64 = 715,309.80/x
  3. Step 3: Cross multiply
    1,318,921.80x = 1,820,123.64 × 715,309.80
  4. Step 4: Simplify right side
    1,318,921.80x = 1,301,952,276,903.67
  5. Step 5: Solve for x
    x = 1,301,952,276,903.67/1,318,921.80
  6. Step 6: Final answer
    x = 987,133.79

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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.