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Finding the Fourth Proportional to 555,475.60, 766,556.76 and 313,758.64

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Solution

The fourth proportional to 555,475.60, 766,556.76 and 313,758.64 is: 432,987.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,475.60 : 766,556.76 = 313,758.64 : x
  2. Step 2: Convert to fraction form
    555,475.60/766,556.76 = 313,758.64/x
  3. Step 3: Cross multiply
    555,475.60x = 766,556.76 × 313,758.64
  4. Step 4: Simplify right side
    555,475.60x = 240,513,806,500.41
  5. Step 5: Solve for x
    x = 240,513,806,500.41/555,475.60
  6. Step 6: Final answer
    x = 432,987.17

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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.