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Finding the Fourth Proportional to 286,364.10, 429,416.55 and 128,511.30

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Solution

The fourth proportional to 286,364.10, 429,416.55 and 128,511.30 is: 192,708.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,364.10 : 429,416.55 = 128,511.30 : x
  2. Step 2: Convert to fraction form
    286,364.10/429,416.55 = 128,511.30/x
  3. Step 3: Cross multiply
    286,364.10x = 429,416.55 × 128,511.30
  4. Step 4: Simplify right side
    286,364.10x = 55,184,879,082.02
  5. Step 5: Solve for x
    x = 55,184,879,082.02/286,364.10
  6. Step 6: Final answer
    x = 192,708.79

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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.