Home / 386,416.08-578,873.55-217,421.10

Finding the Fourth Proportional to 386,416.08, 578,873.55 and 217,421.10

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Solution

The fourth proportional to 386,416.08, 578,873.55 and 217,421.10 is: 325,709.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,416.08 : 578,873.55 = 217,421.10 : x
  2. Step 2: Convert to fraction form
    386,416.08/578,873.55 = 217,421.10/x
  3. Step 3: Cross multiply
    386,416.08x = 578,873.55 × 217,421.10
  4. Step 4: Simplify right side
    386,416.08x = 125,859,324,001.91
  5. Step 5: Solve for x
    x = 125,859,324,001.91/386,416.08
  6. Step 6: Final answer
    x = 325,709.33

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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.