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Finding the Fourth Proportional to 286,659.61, 429,989.61 and 73,428.32

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Solution

The fourth proportional to 286,659.61, 429,989.61 and 73,428.32 is: 110,142.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,659.61 : 429,989.61 = 73,428.32 : x
  2. Step 2: Convert to fraction form
    286,659.61/429,989.61 = 73,428.32/x
  3. Step 3: Cross multiply
    286,659.61x = 429,989.61 × 73,428.32
  4. Step 4: Simplify right side
    286,659.61x = 31,573,416,030.09
  5. Step 5: Solve for x
    x = 31,573,416,030.09/286,659.61
  6. Step 6: Final answer
    x = 110,142.54

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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.