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Finding the Fourth Proportional to 289,907.75, 434,902.65 and 90,248.32

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Solution

The fourth proportional to 289,907.75, 434,902.65 and 90,248.32 is: 135,385.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,907.75 : 434,902.65 = 90,248.32 : x
  2. Step 2: Convert to fraction form
    289,907.75/434,902.65 = 90,248.32/x
  3. Step 3: Cross multiply
    289,907.75x = 434,902.65 × 90,248.32
  4. Step 4: Simplify right side
    289,907.75x = 39,249,232,438.79
  5. Step 5: Solve for x
    x = 39,249,232,438.79/289,907.75
  6. Step 6: Final answer
    x = 135,385.25

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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.