Home / 538,128,221.36-742,616,939.38-290,609,575.61

Finding the Fourth Proportional to 538,128,221.36, 742,616,939.38 and 290,609,575.61

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Solution

The fourth proportional to 538,128,221.36, 742,616,939.38 and 290,609,575.61 is: 401,041,211.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,128,221.36 : 742,616,939.38 = 290,609,575.61 : x
  2. Step 2: Convert to fraction form
    538,128,221.36/742,616,939.38 = 290,609,575.61/x
  3. Step 3: Cross multiply
    538,128,221.36x = 742,616,939.38 × 290,609,575.61
  4. Step 4: Simplify right side
    538,128,221.36x = 215,811,593,590,116,928
  5. Step 5: Solve for x
    x = 215,811,593,590,116,928/538,128,221.36
  6. Step 6: Final answer
    x = 401,041,211.05

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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.