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Finding the Fourth Proportional to 305,787.20, 458,680.80 and 260,516.30

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Solution

The fourth proportional to 305,787.20, 458,680.80 and 260,516.30 is: 390,774.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,787.20 : 458,680.80 = 260,516.30 : x
  2. Step 2: Convert to fraction form
    305,787.20/458,680.80 = 260,516.30/x
  3. Step 3: Cross multiply
    305,787.20x = 458,680.80 × 260,516.30
  4. Step 4: Simplify right side
    305,787.20x = 119,493,824,897.04
  5. Step 5: Solve for x
    x = 119,493,824,897.04/305,787.20
  6. Step 6: Final answer
    x = 390,774.45

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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.