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Finding the Fourth Proportional to 289,448.72, 399,439.22 and 176,271.47

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Solution

The fourth proportional to 289,448.72, 399,439.22 and 176,271.47 is: 243,254.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,448.72 : 399,439.22 = 176,271.47 : x
  2. Step 2: Convert to fraction form
    289,448.72/399,439.22 = 176,271.47/x
  3. Step 3: Cross multiply
    289,448.72x = 399,439.22 × 176,271.47
  4. Step 4: Simplify right side
    289,448.72x = 70,409,738,485.05
  5. Step 5: Solve for x
    x = 70,409,738,485.05/289,448.72
  6. Step 6: Final answer
    x = 243,254.62

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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.