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Finding the Fourth Proportional to 286,445.52, 429,813.72 and 128,641.68

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Solution

The fourth proportional to 286,445.52, 429,813.72 and 128,641.68 is: 193,027.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,445.52 : 429,813.72 = 128,641.68 : x
  2. Step 2: Convert to fraction form
    286,445.52/429,813.72 = 128,641.68/x
  3. Step 3: Cross multiply
    286,445.52x = 429,813.72 × 128,641.68
  4. Step 4: Simplify right side
    286,445.52x = 55,291,959,027.85
  5. Step 5: Solve for x
    x = 55,291,959,027.85/286,445.52
  6. Step 6: Final answer
    x = 193,027.84

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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.