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Finding the Fourth Proportional to 420,052.85, 579,503.56 and 243,126.87

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Solution

The fourth proportional to 420,052.85, 579,503.56 and 243,126.87 is: 335,417.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,052.85 : 579,503.56 = 243,126.87 : x
  2. Step 2: Convert to fraction form
    420,052.85/579,503.56 = 243,126.87/x
  3. Step 3: Cross multiply
    420,052.85x = 579,503.56 × 243,126.87
  4. Step 4: Simplify right side
    420,052.85x = 140,892,882,583.51
  5. Step 5: Solve for x
    x = 140,892,882,583.51/420,052.85
  6. Step 6: Final answer
    x = 335,417.04

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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.