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Finding the Fourth Proportional to 561,903.89, 774,764.80 and 454,140.68

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Solution

The fourth proportional to 561,903.89, 774,764.80 and 454,140.68 is: 626,178.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,903.89 : 774,764.80 = 454,140.68 : x
  2. Step 2: Convert to fraction form
    561,903.89/774,764.80 = 454,140.68/x
  3. Step 3: Cross multiply
    561,903.89x = 774,764.80 × 454,140.68
  4. Step 4: Simplify right side
    561,903.89x = 351,852,208,102.89
  5. Step 5: Solve for x
    x = 351,852,208,102.89/561,903.89
  6. Step 6: Final answer
    x = 626,178.64

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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.