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Finding the Fourth Proportional to 913,418.70, 1,280,885.70 and 913,418.70

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Solution

The fourth proportional to 913,418.70, 1,280,885.70 and 913,418.70 is: 1,280,885.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    913,418.70 : 1,280,885.70 = 913,418.70 : x
  2. Step 2: Convert to fraction form
    913,418.70/1,280,885.70 = 913,418.70/x
  3. Step 3: Cross multiply
    913,418.70x = 1,280,885.70 × 913,418.70
  4. Step 4: Simplify right side
    913,418.70x = 1,169,984,950,942.59
  5. Step 5: Solve for x
    x = 1,169,984,950,942.59/913,418.70
  6. Step 6: Final answer
    x = 1,280,885.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.