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Finding the Fourth Proportional to 383,312.49, 528,971.39 and 208,881.51

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Solution

The fourth proportional to 383,312.49, 528,971.39 and 208,881.51 is: 288,256.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,312.49 : 528,971.39 = 208,881.51 : x
  2. Step 2: Convert to fraction form
    383,312.49/528,971.39 = 208,881.51/x
  3. Step 3: Cross multiply
    383,312.49x = 528,971.39 × 208,881.51
  4. Step 4: Simplify right side
    383,312.49x = 110,492,342,690.00
  5. Step 5: Solve for x
    x = 110,492,342,690.00/383,312.49
  6. Step 6: Final answer
    x = 288,256.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.