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Finding the Fourth Proportional to 620,747.70, 931,121.55 and 616,811.10

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Solution

The fourth proportional to 620,747.70, 931,121.55 and 616,811.10 is: 925,216.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,747.70 : 931,121.55 = 616,811.10 : x
  2. Step 2: Convert to fraction form
    620,747.70/931,121.55 = 616,811.10/x
  3. Step 3: Cross multiply
    620,747.70x = 931,121.55 × 616,811.10
  4. Step 4: Simplify right side
    620,747.70x = 574,326,107,489.21
  5. Step 5: Solve for x
    x = 574,326,107,489.21/620,747.70
  6. Step 6: Final answer
    x = 925,216.65

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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.