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Finding the Fourth Proportional to 554,562.55, 765,331.77 and 312,756.90

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Solution

The fourth proportional to 554,562.55, 765,331.77 and 312,756.90 is: 431,624.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,562.55 : 765,331.77 = 312,756.90 : x
  2. Step 2: Convert to fraction form
    554,562.55/765,331.77 = 312,756.90/x
  3. Step 3: Cross multiply
    554,562.55x = 765,331.77 × 312,756.90
  4. Step 4: Simplify right side
    554,562.55x = 239,362,786,466.27
  5. Step 5: Solve for x
    x = 239,362,786,466.27/554,562.55
  6. Step 6: Final answer
    x = 431,624.51

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1.5x scale

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.