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Finding the Fourth Proportional to 561,038.76, 774,236.34 and 306,389.94

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Solution

The fourth proportional to 561,038.76, 774,236.34 and 306,389.94 is: 422,819.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,038.76 : 774,236.34 = 306,389.94 : x
  2. Step 2: Convert to fraction form
    561,038.76/774,236.34 = 306,389.94/x
  3. Step 3: Cross multiply
    561,038.76x = 774,236.34 × 306,389.94
  4. Step 4: Simplify right side
    561,038.76x = 237,218,225,758.42
  5. Step 5: Solve for x
    x = 237,218,225,758.42/561,038.76
  6. Step 6: Final answer
    x = 422,819.67

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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.