Home / 738,520.61-1,019,158.45-398,988.86

Finding the Fourth Proportional to 738,520.61, 1,019,158.45 and 398,988.86

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Solution

The fourth proportional to 738,520.61, 1,019,158.45 and 398,988.86 is: 550,604.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,520.61 : 1,019,158.45 = 398,988.86 : x
  2. Step 2: Convert to fraction form
    738,520.61/1,019,158.45 = 398,988.86/x
  3. Step 3: Cross multiply
    738,520.61x = 1,019,158.45 × 398,988.86
  4. Step 4: Simplify right side
    738,520.61x = 406,632,862,031.60
  5. Step 5: Solve for x
    x = 406,632,862,031.60/738,520.61
  6. Step 6: Final answer
    x = 550,604.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.