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Finding the Fourth Proportional to 554,626.12, 765,318.21 and 312,894.58

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Solution

The fourth proportional to 554,626.12, 765,318.21 and 312,894.58 is: 431,757.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,626.12 : 765,318.21 = 312,894.58 : x
  2. Step 2: Convert to fraction form
    554,626.12/765,318.21 = 312,894.58/x
  3. Step 3: Cross multiply
    554,626.12x = 765,318.21 × 312,894.58
  4. Step 4: Simplify right side
    554,626.12x = 239,463,916,057.71
  5. Step 5: Solve for x
    x = 239,463,916,057.71/554,626.12
  6. Step 6: Final answer
    x = 431,757.38

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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.