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Finding the Fourth Proportional to 528,907.80, 793,070.10 and 213,007.80

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Solution

The fourth proportional to 528,907.80, 793,070.10 and 213,007.80 is: 319,394.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,907.80 : 793,070.10 = 213,007.80 : x
  2. Step 2: Convert to fraction form
    528,907.80/793,070.10 = 213,007.80/x
  3. Step 3: Cross multiply
    528,907.80x = 793,070.10 × 213,007.80
  4. Step 4: Simplify right side
    528,907.80x = 168,930,117,246.78
  5. Step 5: Solve for x
    x = 168,930,117,246.78/528,907.80
  6. Step 6: Final answer
    x = 319,394.26

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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.