Home / 390,374,461.29-585,540,138.18-285,437,339.52

Finding the Fourth Proportional to 390,374,461.29, 585,540,138.18 and 285,437,339.52

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Solution

The fourth proportional to 390,374,461.29, 585,540,138.18 and 285,437,339.52 is: 428,140,249.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,374,461.29 : 585,540,138.18 = 285,437,339.52 : x
  2. Step 2: Convert to fraction form
    390,374,461.29/585,540,138.18 = 285,437,339.52/x
  3. Step 3: Cross multiply
    390,374,461.29x = 585,540,138.18 × 285,437,339.52
  4. Step 4: Simplify right side
    390,374,461.29x = 167,135,019,224,272,352
  5. Step 5: Solve for x
    x = 167,135,019,224,272,352/390,374,461.29
  6. Step 6: Final answer
    x = 428,140,249.42

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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.