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Finding the Fourth Proportional to 660,521.72, 991,176.23 and 239,830.40

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Solution

The fourth proportional to 660,521.72, 991,176.23 and 239,830.40 is: 359,888.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,521.72 : 991,176.23 = 239,830.40 : x
  2. Step 2: Convert to fraction form
    660,521.72/991,176.23 = 239,830.40/x
  3. Step 3: Cross multiply
    660,521.72x = 991,176.23 × 239,830.40
  4. Step 4: Simplify right side
    660,521.72x = 237,714,194,788.91
  5. Step 5: Solve for x
    x = 237,714,194,788.91/660,521.72
  6. Step 6: Final answer
    x = 359,888.53

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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.