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Finding the Fourth Proportional to 286,603.72, 429,915.20 and 128,832.63

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Solution

The fourth proportional to 286,603.72, 429,915.20 and 128,832.63 is: 193,253.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,603.72 : 429,915.20 = 128,832.63 : x
  2. Step 2: Convert to fraction form
    286,603.72/429,915.20 = 128,832.63/x
  3. Step 3: Cross multiply
    286,603.72x = 429,915.20 × 128,832.63
  4. Step 4: Simplify right side
    286,603.72x = 55,387,103,636.63
  5. Step 5: Solve for x
    x = 55,387,103,636.63/286,603.72
  6. Step 6: Final answer
    x = 193,253.26

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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.