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Finding the Fourth Proportional to 561,323.88, 774,638.10 and 306,690.84

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Solution

The fourth proportional to 561,323.88, 774,638.10 and 306,690.84 is: 423,239.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,323.88 : 774,638.10 = 306,690.84 : x
  2. Step 2: Convert to fraction form
    561,323.88/774,638.10 = 306,690.84/x
  3. Step 3: Cross multiply
    561,323.88x = 774,638.10 × 306,690.84
  4. Step 4: Simplify right side
    561,323.88x = 237,574,409,585.00
  5. Step 5: Solve for x
    x = 237,574,409,585.00/561,323.88
  6. Step 6: Final answer
    x = 423,239.45

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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.