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Finding the Fourth Proportional to 648,856.50, 894,924.21 and 390,464.07

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Solution

The fourth proportional to 648,856.50, 894,924.21 and 390,464.07 is: 538,540.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,856.50 : 894,924.21 = 390,464.07 : x
  2. Step 2: Convert to fraction form
    648,856.50/894,924.21 = 390,464.07/x
  3. Step 3: Cross multiply
    648,856.50x = 894,924.21 × 390,464.07
  4. Step 4: Simplify right side
    648,856.50x = 349,435,749,378.14
  5. Step 5: Solve for x
    x = 349,435,749,378.14/648,856.50
  6. Step 6: Final answer
    x = 538,540.88

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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.