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Finding the Fourth Proportional to 265,731.28, 398,598.36 and 78,744.40

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Solution

The fourth proportional to 265,731.28, 398,598.36 and 78,744.40 is: 118,117.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,731.28 : 398,598.36 = 78,744.40 : x
  2. Step 2: Convert to fraction form
    265,731.28/398,598.36 = 78,744.40/x
  3. Step 3: Cross multiply
    265,731.28x = 398,598.36 × 78,744.40
  4. Step 4: Simplify right side
    265,731.28x = 31,387,388,699.18
  5. Step 5: Solve for x
    x = 31,387,388,699.18/265,731.28
  6. Step 6: Final answer
    x = 118,117.03

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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.