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Finding the Fourth Proportional to 554,426.11, 765,106.99 and 312,707.93

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Solution

The fourth proportional to 554,426.11, 765,106.99 and 312,707.93 is: 431,536.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,426.11 : 765,106.99 = 312,707.93 : x
  2. Step 2: Convert to fraction form
    554,426.11/765,106.99 = 312,707.93/x
  3. Step 3: Cross multiply
    554,426.11x = 765,106.99 × 312,707.93
  4. Step 4: Simplify right side
    554,426.11x = 239,255,024,202.43
  5. Step 5: Solve for x
    x = 239,255,024,202.43/554,426.11
  6. Step 6: Final answer
    x = 431,536.36

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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.