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Finding the Fourth Proportional to 621,007.20, 931,510.80 and 355,286.70

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Solution

The fourth proportional to 621,007.20, 931,510.80 and 355,286.70 is: 532,930.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,007.20 : 931,510.80 = 355,286.70 : x
  2. Step 2: Convert to fraction form
    621,007.20/931,510.80 = 355,286.70/x
  3. Step 3: Cross multiply
    621,007.20x = 931,510.80 × 355,286.70
  4. Step 4: Simplify right side
    621,007.20x = 330,953,398,146.36
  5. Step 5: Solve for x
    x = 330,953,398,146.36/621,007.20
  6. Step 6: Final answer
    x = 532,930.05

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Similar ratio
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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.