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Finding the Fourth Proportional to 390,035.20, 585,162.96 and 109,554.88

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Solution

The fourth proportional to 390,035.20, 585,162.96 and 109,554.88 is: 164,363.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,035.20 : 585,162.96 = 109,554.88 : x
  2. Step 2: Convert to fraction form
    390,035.20/585,162.96 = 109,554.88/x
  3. Step 3: Cross multiply
    390,035.20x = 585,162.96 × 109,554.88
  4. Step 4: Simplify right side
    390,035.20x = 64,107,457,863.24
  5. Step 5: Solve for x
    x = 64,107,457,863.24/390,035.20
  6. Step 6: Final answer
    x = 164,363.26

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1.5x scale

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.