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Finding the Fourth Proportional to 280,393.63, 386,944.83 and 153,070.54

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Solution

The fourth proportional to 280,393.63, 386,944.83 and 153,070.54 is: 211,238.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,393.63 : 386,944.83 = 153,070.54 : x
  2. Step 2: Convert to fraction form
    280,393.63/386,944.83 = 153,070.54/x
  3. Step 3: Cross multiply
    280,393.63x = 386,944.83 × 153,070.54
  4. Step 4: Simplify right side
    280,393.63x = 59,229,851,378.23
  5. Step 5: Solve for x
    x = 59,229,851,378.23/280,393.63
  6. Step 6: Final answer
    x = 211,238.22

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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.