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Finding the Fourth Proportional to 390,367.72, 585,792.22 and 153,670.12

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Solution

The fourth proportional to 390,367.72, 585,792.22 and 153,670.12 is: 230,599.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,367.72 : 585,792.22 = 153,670.12 : x
  2. Step 2: Convert to fraction form
    390,367.72/585,792.22 = 153,670.12/x
  3. Step 3: Cross multiply
    390,367.72x = 585,792.22 × 153,670.12
  4. Step 4: Simplify right side
    390,367.72x = 90,018,760,742.47
  5. Step 5: Solve for x
    x = 90,018,760,742.47/390,367.72
  6. Step 6: Final answer
    x = 230,599.91

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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.