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Finding the Fourth Proportional to 554,854.69, 765,721.20 and 313,145.71

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Solution

The fourth proportional to 554,854.69, 765,721.20 and 313,145.71 is: 432,153.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,854.69 : 765,721.20 = 313,145.71 : x
  2. Step 2: Convert to fraction form
    554,854.69/765,721.20 = 313,145.71/x
  3. Step 3: Cross multiply
    554,854.69x = 765,721.20 × 313,145.71
  4. Step 4: Simplify right side
    554,854.69x = 239,782,308,096.05
  5. Step 5: Solve for x
    x = 239,782,308,096.05/554,854.69
  6. Step 6: Final answer
    x = 432,153.34

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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.