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Finding the Fourth Proportional to 808,866.40, 1,215,632.40 and 706,223.20

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Solution

The fourth proportional to 808,866.40, 1,215,632.40 and 706,223.20 is: 1,061,371.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,866.40 : 1,215,632.40 = 706,223.20 : x
  2. Step 2: Convert to fraction form
    808,866.40/1,215,632.40 = 706,223.20/x
  3. Step 3: Cross multiply
    808,866.40x = 1,215,632.40 × 706,223.20
  4. Step 4: Simplify right side
    808,866.40x = 858,507,803,551.68
  5. Step 5: Solve for x
    x = 858,507,803,551.68/808,866.40
  6. Step 6: Final answer
    x = 1,061,371.57

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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.