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Finding the Fourth Proportional to 554,358.71, 765,011.30 and 312,643.37

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Solution

The fourth proportional to 554,358.71, 765,011.30 and 312,643.37 is: 431,445.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,358.71 : 765,011.30 = 312,643.37 : x
  2. Step 2: Convert to fraction form
    554,358.71/765,011.30 = 312,643.37/x
  3. Step 3: Cross multiply
    554,358.71x = 765,011.30 × 312,643.37
  4. Step 4: Simplify right side
    554,358.71x = 239,175,705,531.81
  5. Step 5: Solve for x
    x = 239,175,705,531.81/554,358.71
  6. Step 6: Final answer
    x = 431,445.75

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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.