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Finding the Fourth Proportional to 633,421.52, 873,790.40 and 391,626.80

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Solution

The fourth proportional to 633,421.52, 873,790.40 and 391,626.80 is: 540,240.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    633,421.52 : 873,790.40 = 391,626.80 : x
  2. Step 2: Convert to fraction form
    633,421.52/873,790.40 = 391,626.80/x
  3. Step 3: Cross multiply
    633,421.52x = 873,790.40 × 391,626.80
  4. Step 4: Simplify right side
    633,421.52x = 342,199,738,222.72
  5. Step 5: Solve for x
    x = 342,199,738,222.72/633,421.52
  6. Step 6: Final answer
    x = 540,240.15

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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.