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Finding the Fourth Proportional to 615,556.26, 923,626.80 and 426,307.86

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Solution

The fourth proportional to 615,556.26, 923,626.80 and 426,307.86 is: 639,664.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,556.26 : 923,626.80 = 426,307.86 : x
  2. Step 2: Convert to fraction form
    615,556.26/923,626.80 = 426,307.86/x
  3. Step 3: Cross multiply
    615,556.26x = 923,626.80 × 426,307.86
  4. Step 4: Simplify right side
    615,556.26x = 393,749,364,546.65
  5. Step 5: Solve for x
    x = 393,749,364,546.65/615,556.26
  6. Step 6: Final answer
    x = 639,664.30

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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.