Home / 491,533,480.96-678,477,854.14-391,245,877.77

Finding the Fourth Proportional to 491,533,480.96, 678,477,854.14 and 391,245,877.77

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Solution

The fourth proportional to 491,533,480.96, 678,477,854.14 and 391,245,877.77 is: 540,047,980.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,533,480.96 : 678,477,854.14 = 391,245,877.77 : x
  2. Step 2: Convert to fraction form
    491,533,480.96/678,477,854.14 = 391,245,877.77/x
  3. Step 3: Cross multiply
    491,533,480.96x = 678,477,854.14 × 391,245,877.77
  4. Step 4: Simplify right side
    491,533,480.96x = 265,451,663,591,352,736
  5. Step 5: Solve for x
    x = 265,451,663,591,352,736/491,533,480.96
  6. Step 6: Final answer
    x = 540,047,980.20

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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.