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Finding the Fourth Proportional to 376,904.32, 520,164.56 and 215,782.40

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Solution

The fourth proportional to 376,904.32, 520,164.56 and 215,782.40 is: 297,800.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    376,904.32 : 520,164.56 = 215,782.40 : x
  2. Step 2: Convert to fraction form
    376,904.32/520,164.56 = 215,782.40/x
  3. Step 3: Cross multiply
    376,904.32x = 520,164.56 × 215,782.40
  4. Step 4: Simplify right side
    376,904.32x = 112,242,357,151.74
  5. Step 5: Solve for x
    x = 112,242,357,151.74/376,904.32
  6. Step 6: Final answer
    x = 297,800.67

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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.