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Finding the Fourth Proportional to 786,404.40, 1,180,481.40 and 487,222.80

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Solution

The fourth proportional to 786,404.40, 1,180,481.40 and 487,222.80 is: 731,376.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,404.40 : 1,180,481.40 = 487,222.80 : x
  2. Step 2: Convert to fraction form
    786,404.40/1,180,481.40 = 487,222.80/x
  3. Step 3: Cross multiply
    786,404.40x = 1,180,481.40 × 487,222.80
  4. Step 4: Simplify right side
    786,404.40x = 575,157,453,055.92
  5. Step 5: Solve for x
    x = 575,157,453,055.92/786,404.40
  6. Step 6: Final answer
    x = 731,376.19

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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.