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Finding the Fourth Proportional to 292,281.90, 438,422.85 and 212,577.90

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Solution

The fourth proportional to 292,281.90, 438,422.85 and 212,577.90 is: 318,866.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,281.90 : 438,422.85 = 212,577.90 : x
  2. Step 2: Convert to fraction form
    292,281.90/438,422.85 = 212,577.90/x
  3. Step 3: Cross multiply
    292,281.90x = 438,422.85 × 212,577.90
  4. Step 4: Simplify right side
    292,281.90x = 93,199,008,765.02
  5. Step 5: Solve for x
    x = 93,199,008,765.02/292,281.90
  6. Step 6: Final answer
    x = 318,866.85

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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.