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Finding the Fourth Proportional to 1,249,702.40, 1,724,166.08 and 819,942.40

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Solution

The fourth proportional to 1,249,702.40, 1,724,166.08 and 819,942.40 is: 1,131,242.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,249,702.40 : 1,724,166.08 = 819,942.40 : x
  2. Step 2: Convert to fraction form
    1,249,702.40/1,724,166.08 = 819,942.40/x
  3. Step 3: Cross multiply
    1,249,702.40x = 1,724,166.08 × 819,942.40
  4. Step 4: Simplify right side
    1,249,702.40x = 1,413,716,873,633.79
  5. Step 5: Solve for x
    x = 1,413,716,873,633.79/1,249,702.40
  6. Step 6: Final answer
    x = 1,131,242.83

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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.