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Finding the Fourth Proportional to 280,460.64, 387,020.34 and 153,133.32

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Solution

The fourth proportional to 280,460.64, 387,020.34 and 153,133.32 is: 211,315.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,460.64 : 387,020.34 = 153,133.32 : x
  2. Step 2: Convert to fraction form
    280,460.64/387,020.34 = 153,133.32/x
  3. Step 3: Cross multiply
    280,460.64x = 387,020.34 × 153,133.32
  4. Step 4: Simplify right side
    280,460.64x = 59,265,709,571.73
  5. Step 5: Solve for x
    x = 59,265,709,571.73/280,460.64
  6. Step 6: Final answer
    x = 211,315.60

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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.