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Finding the Fourth Proportional to 555,085.80, 766,021.14 and 313,378.20

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Solution

The fourth proportional to 555,085.80, 766,021.14 and 313,378.20 is: 432,463.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,085.80 : 766,021.14 = 313,378.20 : x
  2. Step 2: Convert to fraction form
    555,085.80/766,021.14 = 313,378.20/x
  3. Step 3: Cross multiply
    555,085.80x = 766,021.14 × 313,378.20
  4. Step 4: Simplify right side
    555,085.80x = 240,054,326,015.15
  5. Step 5: Solve for x
    x = 240,054,326,015.15/555,085.80
  6. Step 6: Final answer
    x = 432,463.46

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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.