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Finding the Fourth Proportional to 403,587.60, 606,693.60 and 286,072.80

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Solution

The fourth proportional to 403,587.60, 606,693.60 and 286,072.80 is: 430,039.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,587.60 : 606,693.60 = 286,072.80 : x
  2. Step 2: Convert to fraction form
    403,587.60/606,693.60 = 286,072.80/x
  3. Step 3: Cross multiply
    403,587.60x = 606,693.60 × 286,072.80
  4. Step 4: Simplify right side
    403,587.60x = 173,558,536,894.08
  5. Step 5: Solve for x
    x = 173,558,536,894.08/403,587.60
  6. Step 6: Final answer
    x = 430,039.32

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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.