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Finding the Fourth Proportional to 554,391.64, 765,060.32 and 312,673.67

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Solution

The fourth proportional to 554,391.64, 765,060.32 and 312,673.67 is: 431,489.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,391.64 : 765,060.32 = 312,673.67 : x
  2. Step 2: Convert to fraction form
    554,391.64/765,060.32 = 312,673.67/x
  3. Step 3: Cross multiply
    554,391.64x = 765,060.32 × 312,673.67
  4. Step 4: Simplify right side
    554,391.64x = 239,214,217,851.13
  5. Step 5: Solve for x
    x = 239,214,217,851.13/554,391.64
  6. Step 6: Final answer
    x = 431,489.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.