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Finding the Fourth Proportional to 556,617.80, 768,678.18 and 384,975.56

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Solution

The fourth proportional to 556,617.80, 768,678.18 and 384,975.56 is: 531,643.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,617.80 : 768,678.18 = 384,975.56 : x
  2. Step 2: Convert to fraction form
    556,617.80/768,678.18 = 384,975.56/x
  3. Step 3: Cross multiply
    556,617.80x = 768,678.18 × 384,975.56
  4. Step 4: Simplify right side
    556,617.80x = 295,922,312,805.28
  5. Step 5: Solve for x
    x = 295,922,312,805.28/556,617.80
  6. Step 6: Final answer
    x = 531,643.64

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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.