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Finding the Fourth Proportional to 280,612.82, 387,256.12 and 153,289.28

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Solution

The fourth proportional to 280,612.82, 387,256.12 and 153,289.28 is: 211,544.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,612.82 : 387,256.12 = 153,289.28 : x
  2. Step 2: Convert to fraction form
    280,612.82/387,256.12 = 153,289.28/x
  3. Step 3: Cross multiply
    280,612.82x = 387,256.12 × 153,289.28
  4. Step 4: Simplify right side
    280,612.82x = 59,362,211,810.39
  5. Step 5: Solve for x
    x = 59,362,211,810.39/280,612.82
  6. Step 6: Final answer
    x = 211,544.90

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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.