Home / 1,287,625.80-1,931,429.10-389,065.80

Finding the Fourth Proportional to 1,287,625.80, 1,931,429.10 and 389,065.80

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Solution

The fourth proportional to 1,287,625.80, 1,931,429.10 and 389,065.80 is: 583,595.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,625.80 : 1,931,429.10 = 389,065.80 : x
  2. Step 2: Convert to fraction form
    1,287,625.80/1,931,429.10 = 389,065.80/x
  3. Step 3: Cross multiply
    1,287,625.80x = 1,931,429.10 × 389,065.80
  4. Step 4: Simplify right side
    1,287,625.80x = 751,453,007,934.78
  5. Step 5: Solve for x
    x = 751,453,007,934.78/1,287,625.80
  6. Step 6: Final answer
    x = 583,595.80

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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.