Home / 1,287,351.80-1,931,027.70-816,126.20

Finding the Fourth Proportional to 1,287,351.80, 1,931,027.70 and 816,126.20

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Solution

The fourth proportional to 1,287,351.80, 1,931,027.70 and 816,126.20 is: 1,224,189.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,351.80 : 1,931,027.70 = 816,126.20 : x
  2. Step 2: Convert to fraction form
    1,287,351.80/1,931,027.70 = 816,126.20/x
  3. Step 3: Cross multiply
    1,287,351.80x = 1,931,027.70 × 816,126.20
  4. Step 4: Simplify right side
    1,287,351.80x = 1,575,962,298,895.74
  5. Step 5: Solve for x
    x = 1,575,962,298,895.74/1,287,351.80
  6. Step 6: Final answer
    x = 1,224,189.30

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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.