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Finding the Fourth Proportional to 354,719.40, 532,079.10 and 105,401.40

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Solution

The fourth proportional to 354,719.40, 532,079.10 and 105,401.40 is: 158,102.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,719.40 : 532,079.10 = 105,401.40 : x
  2. Step 2: Convert to fraction form
    354,719.40/532,079.10 = 105,401.40/x
  3. Step 3: Cross multiply
    354,719.40x = 532,079.10 × 105,401.40
  4. Step 4: Simplify right side
    354,719.40x = 56,081,882,050.74
  5. Step 5: Solve for x
    x = 56,081,882,050.74/354,719.40
  6. Step 6: Final answer
    x = 158,102.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.