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Finding the Fourth Proportional to 289,907.53, 434,902.31 and 90,248.07

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Solution

The fourth proportional to 289,907.53, 434,902.31 and 90,248.07 is: 135,384.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,907.53 : 434,902.31 = 90,248.07 : x
  2. Step 2: Convert to fraction form
    289,907.53/434,902.31 = 90,248.07/x
  3. Step 3: Cross multiply
    289,907.53x = 434,902.31 × 90,248.07
  4. Step 4: Simplify right side
    289,907.53x = 39,249,092,577.55
  5. Step 5: Solve for x
    x = 39,249,092,577.55/289,907.53
  6. Step 6: Final answer
    x = 135,384.87

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1.5x scale

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.