Home / 1,355,988.79-1,871,128.31-812,110.65

Finding the Fourth Proportional to 1,355,988.79, 1,871,128.31 and 812,110.65

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Solution

The fourth proportional to 1,355,988.79, 1,871,128.31 and 812,110.65 is: 1,120,631.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355,988.79 : 1,871,128.31 = 812,110.65 : x
  2. Step 2: Convert to fraction form
    1,355,988.79/1,871,128.31 = 812,110.65/x
  3. Step 3: Cross multiply
    1,355,988.79x = 1,871,128.31 × 812,110.65
  4. Step 4: Simplify right side
    1,355,988.79x = 1,519,563,228,067.50
  5. Step 5: Solve for x
    x = 1,519,563,228,067.50/1,355,988.79
  6. Step 6: Final answer
    x = 1,120,631.11

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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.