Home / 390,325,856.36-538,644,656.46-223,060,202.18

Finding the Fourth Proportional to 390,325,856.36, 538,644,656.46 and 223,060,202.18

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Solution

The fourth proportional to 390,325,856.36, 538,644,656.46 and 223,060,202.18 is: 307,820,207.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,325,856.36 : 538,644,656.46 = 223,060,202.18 : x
  2. Step 2: Convert to fraction form
    390,325,856.36/538,644,656.46 = 223,060,202.18/x
  3. Step 3: Cross multiply
    390,325,856.36x = 538,644,656.46 × 223,060,202.18
  4. Step 4: Simplify right side
    390,325,856.36x = 120,150,185,973,144,256
  5. Step 5: Solve for x
    x = 120,150,185,973,144,256/390,325,856.36
  6. Step 6: Final answer
    x = 307,820,207.18

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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.