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Finding the Fourth Proportional to 278,432.81, 384,038.81 and 255,536.40

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Solution

The fourth proportional to 278,432.81, 384,038.81 and 255,536.40 is: 352,458.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,432.81 : 384,038.81 = 255,536.40 : x
  2. Step 2: Convert to fraction form
    278,432.81/384,038.81 = 255,536.40/x
  3. Step 3: Cross multiply
    278,432.81x = 384,038.81 × 255,536.40
  4. Step 4: Simplify right side
    278,432.81x = 98,135,894,967.68
  5. Step 5: Solve for x
    x = 98,135,894,967.68/278,432.81
  6. Step 6: Final answer
    x = 352,458.08

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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.