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Finding the Fourth Proportional to 390,056.80, 546,816.80 and 390,056.80

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Solution

The fourth proportional to 390,056.80, 546,816.80 and 390,056.80 is: 546,816.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,056.80 : 546,816.80 = 390,056.80 : x
  2. Step 2: Convert to fraction form
    390,056.80/546,816.80 = 390,056.80/x
  3. Step 3: Cross multiply
    390,056.80x = 546,816.80 × 390,056.80
  4. Step 4: Simplify right side
    390,056.80x = 213,289,611,194.24
  5. Step 5: Solve for x
    x = 213,289,611,194.24/390,056.80
  6. Step 6: Final answer
    x = 546,816.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.