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Finding the Fourth Proportional to 573,040.20, 860,478.30 and 455,687.40

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Solution

The fourth proportional to 573,040.20, 860,478.30 and 455,687.40 is: 684,261.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    573,040.20 : 860,478.30 = 455,687.40 : x
  2. Step 2: Convert to fraction form
    573,040.20/860,478.30 = 455,687.40/x
  3. Step 3: Cross multiply
    573,040.20x = 860,478.30 × 455,687.40
  4. Step 4: Simplify right side
    573,040.20x = 392,109,119,283.42
  5. Step 5: Solve for x
    x = 392,109,119,283.42/573,040.20
  6. Step 6: Final answer
    x = 684,261.10

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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.