Home / 390,090,224.64-538,321,659-213,875,316.78

Finding the Fourth Proportional to 390,090,224.64, 538,321,659 and 213,875,316.78

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Solution

The fourth proportional to 390,090,224.64, 538,321,659 and 213,875,316.78 is: 295,146,374.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,090,224.64 : 538,321,659 = 213,875,316.78 : x
  2. Step 2: Convert to fraction form
    390,090,224.64/538,321,659 = 213,875,316.78/x
  3. Step 3: Cross multiply
    390,090,224.64x = 538,321,659 × 213,875,316.78
  4. Step 4: Simplify right side
    390,090,224.64x = 115,133,715,348,160,144
  5. Step 5: Solve for x
    x = 115,133,715,348,160,144/390,090,224.64
  6. Step 6: Final answer
    x = 295,146,374.03

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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.