Home / 738,137.80-1,107,149.10-288,771.40

Finding the Fourth Proportional to 738,137.80, 1,107,149.10 and 288,771.40

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Solution

The fourth proportional to 738,137.80, 1,107,149.10 and 288,771.40 is: 433,134.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,137.80 : 1,107,149.10 = 288,771.40 : x
  2. Step 2: Convert to fraction form
    738,137.80/1,107,149.10 = 288,771.40/x
  3. Step 3: Cross multiply
    738,137.80x = 1,107,149.10 × 288,771.40
  4. Step 4: Simplify right side
    738,137.80x = 319,712,995,615.74
  5. Step 5: Solve for x
    x = 319,712,995,615.74/738,137.80
  6. Step 6: Final answer
    x = 433,134.57

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1.5x scale

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.