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Finding the Fourth Proportional to 554,484.56, 765,156.86 and 312,752.72

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Solution

The fourth proportional to 554,484.56, 765,156.86 and 312,752.72 is: 431,580.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,484.56 : 765,156.86 = 312,752.72 : x
  2. Step 2: Convert to fraction form
    554,484.56/765,156.86 = 312,752.72/x
  3. Step 3: Cross multiply
    554,484.56x = 765,156.86 × 312,752.72
  4. Step 4: Simplify right side
    554,484.56x = 239,304,889,191.66
  5. Step 5: Solve for x
    x = 239,304,889,191.66/554,484.56
  6. Step 6: Final answer
    x = 431,580.80

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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.