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Finding the Fourth Proportional to 280,673.56, 387,315.42 and 153,325.72

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Solution

The fourth proportional to 280,673.56, 387,315.42 and 153,325.72 is: 211,581.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,673.56 : 387,315.42 = 153,325.72 : x
  2. Step 2: Convert to fraction form
    280,673.56/387,315.42 = 153,325.72/x
  3. Step 3: Cross multiply
    280,673.56x = 387,315.42 × 153,325.72
  4. Step 4: Simplify right side
    280,673.56x = 59,385,415,638.60
  5. Step 5: Solve for x
    x = 59,385,415,638.60/280,673.56
  6. Step 6: Final answer
    x = 211,581.80

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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.