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Finding the Fourth Proportional to 561,430.88, 774,776.61 and 306,782.07

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Solution

The fourth proportional to 561,430.88, 774,776.61 and 306,782.07 is: 423,360.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,430.88 : 774,776.61 = 306,782.07 : x
  2. Step 2: Convert to fraction form
    561,430.88/774,776.61 = 306,782.07/x
  3. Step 3: Cross multiply
    561,430.88x = 774,776.61 × 306,782.07
  4. Step 4: Simplify right side
    561,430.88x = 237,687,569,297.97
  5. Step 5: Solve for x
    x = 237,687,569,297.97/561,430.88
  6. Step 6: Final answer
    x = 423,360.34

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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.