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Finding the Fourth Proportional to 555,328.90, 766,383.69 and 313,621.66

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Solution

The fourth proportional to 555,328.90, 766,383.69 and 313,621.66 is: 432,814.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,328.90 : 766,383.69 = 313,621.66 : x
  2. Step 2: Convert to fraction form
    555,328.90/766,383.69 = 313,621.66/x
  3. Step 3: Cross multiply
    555,328.90x = 766,383.69 × 313,621.66
  4. Step 4: Simplify right side
    555,328.90x = 240,354,525,054.73
  5. Step 5: Solve for x
    x = 240,354,525,054.73/555,328.90
  6. Step 6: Final answer
    x = 432,814.72

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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.