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Finding the Fourth Proportional to 555,065.08, 766,009.71 and 313,390.66

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Solution

The fourth proportional to 555,065.08, 766,009.71 and 313,390.66 is: 432,490.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,065.08 : 766,009.71 = 313,390.66 : x
  2. Step 2: Convert to fraction form
    555,065.08/766,009.71 = 313,390.66/x
  3. Step 3: Cross multiply
    555,065.08x = 766,009.71 × 313,390.66
  4. Step 4: Simplify right side
    555,065.08x = 240,060,288,583.31
  5. Step 5: Solve for x
    x = 240,060,288,583.31/555,065.08
  6. Step 6: Final answer
    x = 432,490.35

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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.