Home / 390,374,462.15-585,540,139.47-285,437,340.38

Finding the Fourth Proportional to 390,374,462.15, 585,540,139.47 and 285,437,340.38

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Solution

The fourth proportional to 390,374,462.15, 585,540,139.47 and 285,437,340.38 is: 428,140,250.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,374,462.15 : 585,540,139.47 = 285,437,340.38 : x
  2. Step 2: Convert to fraction form
    390,374,462.15/585,540,139.47 = 285,437,340.38/x
  3. Step 3: Cross multiply
    390,374,462.15x = 585,540,139.47 × 285,437,340.38
  4. Step 4: Simplify right side
    390,374,462.15x = 167,135,020,096,389,536
  5. Step 5: Solve for x
    x = 167,135,020,096,389,536/390,374,462.15
  6. Step 6: Final answer
    x = 428,140,250.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.