Home / 515,565,581.38-711,495,899.67-317,441,374.72

Finding the Fourth Proportional to 515,565,581.38, 711,495,899.67 and 317,441,374.72

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Solution

The fourth proportional to 515,565,581.38, 711,495,899.67 and 317,441,374.72 is: 438,078,577.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,565,581.38 : 711,495,899.67 = 317,441,374.72 : x
  2. Step 2: Convert to fraction form
    515,565,581.38/711,495,899.67 = 317,441,374.72/x
  3. Step 3: Cross multiply
    515,565,581.38x = 711,495,899.67 × 317,441,374.72
  4. Step 4: Simplify right side
    515,565,581.38x = 225,858,236,498,888,000
  5. Step 5: Solve for x
    x = 225,858,236,498,888,000/515,565,581.38
  6. Step 6: Final answer
    x = 438,078,577.50

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Double scale
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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.