Home / 390,390,280.38-585,682,342.92-193,745,985.39

Finding the Fourth Proportional to 390,390,280.38, 585,682,342.92 and 193,745,985.39

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Solution

The fourth proportional to 390,390,280.38, 585,682,342.92 and 193,745,985.39 is: 290,667,079.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,390,280.38 : 585,682,342.92 = 193,745,985.39 : x
  2. Step 2: Convert to fraction form
    390,390,280.38/585,682,342.92 = 193,745,985.39/x
  3. Step 3: Cross multiply
    390,390,280.38x = 585,682,342.92 × 193,745,985.39
  4. Step 4: Simplify right side
    390,390,280.38x = 113,473,602,654,559,280
  5. Step 5: Solve for x
    x = 113,473,602,654,559,280/390,390,280.38
  6. Step 6: Final answer
    x = 290,667,079.48

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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.