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Finding the Fourth Proportional to 305,931.20, 458,896.80 and 260,660.30

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Solution

The fourth proportional to 305,931.20, 458,896.80 and 260,660.30 is: 390,990.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,931.20 : 458,896.80 = 260,660.30 : x
  2. Step 2: Convert to fraction form
    305,931.20/458,896.80 = 260,660.30/x
  3. Step 3: Cross multiply
    305,931.20x = 458,896.80 × 260,660.30
  4. Step 4: Simplify right side
    305,931.20x = 119,616,177,557.04
  5. Step 5: Solve for x
    x = 119,616,177,557.04/305,931.20
  6. Step 6: Final answer
    x = 390,990.45

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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.