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Finding the Fourth Proportional to 286,703.10, 429,925.05 and 128,850.30

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Solution

The fourth proportional to 286,703.10, 429,925.05 and 128,850.30 is: 193,217.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,703.10 : 429,925.05 = 128,850.30 : x
  2. Step 2: Convert to fraction form
    286,703.10/429,925.05 = 128,850.30/x
  3. Step 3: Cross multiply
    286,703.10x = 429,925.05 × 128,850.30
  4. Step 4: Simplify right side
    286,703.10x = 55,395,971,670.02
  5. Step 5: Solve for x
    x = 55,395,971,670.02/286,703.10
  6. Step 6: Final answer
    x = 193,217.21

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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.