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Finding the Fourth Proportional to 670,645,627.80, 925,491,010.86 and 373,281,488.40

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Solution

The fourth proportional to 670,645,627.80, 925,491,010.86 and 373,281,488.40 is: 515,128,478.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,645,627.80 : 925,491,010.86 = 373,281,488.40 : x
  2. Step 2: Convert to fraction form
    670,645,627.80/925,491,010.86 = 373,281,488.40/x
  3. Step 3: Cross multiply
    670,645,627.80x = 925,491,010.86 × 373,281,488.40
  4. Step 4: Simplify right side
    670,645,627.80x = 345,468,662,034,641,344
  5. Step 5: Solve for x
    x = 345,468,662,034,641,344/670,645,627.80
  6. Step 6: Final answer
    x = 515,128,478.76

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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.