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Finding the Fourth Proportional to 478,427.92, 716,965.28 and 265,289.72

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Solution

The fourth proportional to 478,427.92, 716,965.28 and 265,289.72 is: 397,559.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,427.92 : 716,965.28 = 265,289.72 : x
  2. Step 2: Convert to fraction form
    478,427.92/716,965.28 = 265,289.72/x
  3. Step 3: Cross multiply
    478,427.92x = 716,965.28 × 265,289.72
  4. Step 4: Simplify right side
    478,427.92x = 190,203,518,380.92
  5. Step 5: Solve for x
    x = 190,203,518,380.92/478,427.92
  6. Step 6: Final answer
    x = 397,559.40

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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.