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Finding the Fourth Proportional to 305,907.20, 458,860.80 and 260,636.30

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Solution

The fourth proportional to 305,907.20, 458,860.80 and 260,636.30 is: 390,954.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,907.20 : 458,860.80 = 260,636.30 : x
  2. Step 2: Convert to fraction form
    305,907.20/458,860.80 = 260,636.30/x
  3. Step 3: Cross multiply
    305,907.20x = 458,860.80 × 260,636.30
  4. Step 4: Simplify right side
    305,907.20x = 119,595,781,127.04
  5. Step 5: Solve for x
    x = 119,595,781,127.04/305,907.20
  6. Step 6: Final answer
    x = 390,954.45

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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.