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Finding the Fourth Proportional to 522,562.80, 782,313.30 and 390,030.60

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Solution

The fourth proportional to 522,562.80, 782,313.30 and 390,030.60 is: 583,903.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,562.80 : 782,313.30 = 390,030.60 : x
  2. Step 2: Convert to fraction form
    522,562.80/782,313.30 = 390,030.60/x
  3. Step 3: Cross multiply
    522,562.80x = 782,313.30 × 390,030.60
  4. Step 4: Simplify right side
    522,562.80x = 305,126,125,786.98
  5. Step 5: Solve for x
    x = 305,126,125,786.98/522,562.80
  6. Step 6: Final answer
    x = 583,903.27

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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.