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Finding the Fourth Proportional to 305,905.70, 458,858.55 and 260,634.80

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Solution

The fourth proportional to 305,905.70, 458,858.55 and 260,634.80 is: 390,952.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,905.70 : 458,858.55 = 260,634.80 : x
  2. Step 2: Convert to fraction form
    305,905.70/458,858.55 = 260,634.80/x
  3. Step 3: Cross multiply
    305,905.70x = 458,858.55 × 260,634.80
  4. Step 4: Simplify right side
    305,905.70x = 119,594,506,407.54
  5. Step 5: Solve for x
    x = 119,594,506,407.54/305,905.70
  6. Step 6: Final answer
    x = 390,952.20

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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.