Home / 1,287,862.80-1,931,784.60-389,302.80

Finding the Fourth Proportional to 1,287,862.80, 1,931,784.60 and 389,302.80

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Solution

The fourth proportional to 1,287,862.80, 1,931,784.60 and 389,302.80 is: 583,951.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,862.80 : 1,931,784.60 = 389,302.80 : x
  2. Step 2: Convert to fraction form
    1,287,862.80/1,931,784.60 = 389,302.80/x
  3. Step 3: Cross multiply
    1,287,862.80x = 1,931,784.60 × 389,302.80
  4. Step 4: Simplify right side
    1,287,862.80x = 752,049,153,776.88
  5. Step 5: Solve for x
    x = 752,049,153,776.88/1,287,862.80
  6. Step 6: Final answer
    x = 583,951.30

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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.