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Finding the Fourth Proportional to 555,022.94, 765,931.34 and 313,307.60

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Solution

The fourth proportional to 555,022.94, 765,931.34 and 313,307.60 is: 432,364.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,022.94 : 765,931.34 = 313,307.60 : x
  2. Step 2: Convert to fraction form
    555,022.94/765,931.34 = 313,307.60/x
  3. Step 3: Cross multiply
    555,022.94x = 765,931.34 × 313,307.60
  4. Step 4: Simplify right side
    555,022.94x = 239,972,106,853.80
  5. Step 5: Solve for x
    x = 239,972,106,853.80/555,022.94
  6. Step 6: Final answer
    x = 432,364.31

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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.