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Finding the Fourth Proportional to 286,487.06, 429,582.76 and 128,580.39

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Solution

The fourth proportional to 286,487.06, 429,582.76 and 128,580.39 is: 192,804.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,487.06 : 429,582.76 = 128,580.39 : x
  2. Step 2: Convert to fraction form
    286,487.06/429,582.76 = 128,580.39/x
  3. Step 3: Cross multiply
    286,487.06x = 429,582.76 × 128,580.39
  4. Step 4: Simplify right side
    286,487.06x = 55,235,918,496.63
  5. Step 5: Solve for x
    x = 55,235,918,496.63/286,487.06
  6. Step 6: Final answer
    x = 192,804.24

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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.