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Finding the Fourth Proportional to 554,483.56, 765,155.48 and 312,751.72

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Solution

The fourth proportional to 554,483.56, 765,155.48 and 312,751.72 is: 431,579.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,483.56 : 765,155.48 = 312,751.72 : x
  2. Step 2: Convert to fraction form
    554,483.56/765,155.48 = 312,751.72/x
  3. Step 3: Cross multiply
    554,483.56x = 765,155.48 × 312,751.72
  4. Step 4: Simplify right side
    554,483.56x = 239,303,692,437.43
  5. Step 5: Solve for x
    x = 239,303,692,437.43/554,483.56
  6. Step 6: Final answer
    x = 431,579.42

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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.