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Finding the Fourth Proportional to 280,790.50, 387,490.17 and 153,466.96

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Solution

The fourth proportional to 280,790.50, 387,490.17 and 153,466.96 is: 211,784.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,790.50 : 387,490.17 = 153,466.96 : x
  2. Step 2: Convert to fraction form
    280,790.50/387,490.17 = 153,466.96/x
  3. Step 3: Cross multiply
    280,790.50x = 387,490.17 × 153,466.96
  4. Step 4: Simplify right side
    280,790.50x = 59,466,938,419.78
  5. Step 5: Solve for x
    x = 59,466,938,419.78/280,790.50
  6. Step 6: Final answer
    x = 211,784.01

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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.