Home / 390,815.26-586,293.10-138,242.14

Finding the Fourth Proportional to 390,815.26, 586,293.10 and 138,242.14

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Solution

The fourth proportional to 390,815.26, 586,293.10 and 138,242.14 is: 207,388.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,815.26 : 586,293.10 = 138,242.14 : x
  2. Step 2: Convert to fraction form
    390,815.26/586,293.10 = 138,242.14/x
  3. Step 3: Cross multiply
    390,815.26x = 586,293.10 × 138,242.14
  4. Step 4: Simplify right side
    390,815.26x = 81,050,412,811.23
  5. Step 5: Solve for x
    x = 81,050,412,811.23/390,815.26
  6. Step 6: Final answer
    x = 207,388.05

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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.