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Finding the Fourth Proportional to 305,999.70, 458,999.55 and 285,263.70

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Solution

The fourth proportional to 305,999.70, 458,999.55 and 285,263.70 is: 427,895.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,999.70 : 458,999.55 = 285,263.70 : x
  2. Step 2: Convert to fraction form
    305,999.70/458,999.55 = 285,263.70/x
  3. Step 3: Cross multiply
    305,999.70x = 458,999.55 × 285,263.70
  4. Step 4: Simplify right side
    305,999.70x = 130,935,909,931.34
  5. Step 5: Solve for x
    x = 130,935,909,931.34/305,999.70
  6. Step 6: Final answer
    x = 427,895.55

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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.