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Finding the Fourth Proportional to 384,558.40, 576,319.20 and 257,838.40

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Solution

The fourth proportional to 384,558.40, 576,319.20 and 257,838.40 is: 386,410.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,558.40 : 576,319.20 = 257,838.40 : x
  2. Step 2: Convert to fraction form
    384,558.40/576,319.20 = 257,838.40/x
  3. Step 3: Cross multiply
    384,558.40x = 576,319.20 × 257,838.40
  4. Step 4: Simplify right side
    384,558.40x = 148,597,220,417.28
  5. Step 5: Solve for x
    x = 148,597,220,417.28/384,558.40
  6. Step 6: Final answer
    x = 386,410.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.