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Finding the Fourth Proportional to 1,283,393.88, 1,926,983.16 and 715,883.76

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Solution

The fourth proportional to 1,283,393.88, 1,926,983.16 and 715,883.76 is: 1,074,881.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,283,393.88 : 1,926,983.16 = 715,883.76 : x
  2. Step 2: Convert to fraction form
    1,283,393.88/1,926,983.16 = 715,883.76/x
  3. Step 3: Cross multiply
    1,283,393.88x = 1,926,983.16 × 715,883.76
  4. Step 4: Simplify right side
    1,283,393.88x = 1,379,495,950,037.48
  5. Step 5: Solve for x
    x = 1,379,495,950,037.48/1,283,393.88
  6. Step 6: Final answer
    x = 1,074,881.20

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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.