Home / 1,288,205.18-1,931,569.65-389,512.20

Finding the Fourth Proportional to 1,288,205.18, 1,931,569.65 and 389,512.20

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Solution

The fourth proportional to 1,288,205.18, 1,931,569.65 and 389,512.20 is: 584,045.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,205.18 : 1,931,569.65 = 389,512.20 : x
  2. Step 2: Convert to fraction form
    1,288,205.18/1,931,569.65 = 389,512.20/x
  3. Step 3: Cross multiply
    1,288,205.18x = 1,931,569.65 × 389,512.20
  4. Step 4: Simplify right side
    1,288,205.18x = 752,369,943,824.73
  5. Step 5: Solve for x
    x = 752,369,943,824.73/1,288,205.18
  6. Step 6: Final answer
    x = 584,045.12

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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.