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Finding the Fourth Proportional to 1,294,935.40, 1,942,403.10 and 665,079.40

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Solution

The fourth proportional to 1,294,935.40, 1,942,403.10 and 665,079.40 is: 997,619.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294,935.40 : 1,942,403.10 = 665,079.40 : x
  2. Step 2: Convert to fraction form
    1,294,935.40/1,942,403.10 = 665,079.40/x
  3. Step 3: Cross multiply
    1,294,935.40x = 1,942,403.10 × 665,079.40
  4. Step 4: Simplify right side
    1,294,935.40x = 1,291,852,288,306.14
  5. Step 5: Solve for x
    x = 1,291,852,288,306.14/1,294,935.40
  6. Step 6: Final answer
    x = 997,619.10

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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.