Home / 390,088.21-585,244.40-162,339.50

Finding the Fourth Proportional to 390,088.21, 585,244.40 and 162,339.50

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Solution

The fourth proportional to 390,088.21, 585,244.40 and 162,339.50 is: 243,555.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,088.21 : 585,244.40 = 162,339.50 : x
  2. Step 2: Convert to fraction form
    390,088.21/585,244.40 = 162,339.50/x
  3. Step 3: Cross multiply
    390,088.21x = 585,244.40 × 162,339.50
  4. Step 4: Simplify right side
    390,088.21x = 95,008,283,273.80
  5. Step 5: Solve for x
    x = 95,008,283,273.80/390,088.21
  6. Step 6: Final answer
    x = 243,555.90

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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.