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Finding the Fourth Proportional to 528,808.25, 792,669.42 and 208,830.40

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Solution

The fourth proportional to 528,808.25, 792,669.42 and 208,830.40 is: 313,031.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,808.25 : 792,669.42 = 208,830.40 : x
  2. Step 2: Convert to fraction form
    528,808.25/792,669.42 = 208,830.40/x
  3. Step 3: Cross multiply
    528,808.25x = 792,669.42 × 208,830.40
  4. Step 4: Simplify right side
    528,808.25x = 165,533,473,936.12
  5. Step 5: Solve for x
    x = 165,533,473,936.12/528,808.25
  6. Step 6: Final answer
    x = 313,031.19

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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.