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Finding the Fourth Proportional to 280,484.46, 387,101.75 and 157,980.87

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Solution

The fourth proportional to 280,484.46, 387,101.75 and 157,980.87 is: 218,032.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,484.46 : 387,101.75 = 157,980.87 : x
  2. Step 2: Convert to fraction form
    280,484.46/387,101.75 = 157,980.87/x
  3. Step 3: Cross multiply
    280,484.46x = 387,101.75 × 157,980.87
  4. Step 4: Simplify right side
    280,484.46x = 61,154,670,453.62
  5. Step 5: Solve for x
    x = 61,154,670,453.62/280,484.46
  6. Step 6: Final answer
    x = 218,032.29

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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.