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Finding the Fourth Proportional to 561,254.40, 774,558.72 and 319,541.76

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Solution

The fourth proportional to 561,254.40, 774,558.72 and 319,541.76 is: 440,983.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,254.40 : 774,558.72 = 319,541.76 : x
  2. Step 2: Convert to fraction form
    561,254.40/774,558.72 = 319,541.76/x
  3. Step 3: Cross multiply
    561,254.40x = 774,558.72 × 319,541.76
  4. Step 4: Simplify right side
    561,254.40x = 247,503,856,612.15
  5. Step 5: Solve for x
    x = 247,503,856,612.15/561,254.40
  6. Step 6: Final answer
    x = 440,983.37

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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.