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Finding the Fourth Proportional to 550,362.45, 825,543.68 and 390,930.15

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Solution

The fourth proportional to 550,362.45, 825,543.68 and 390,930.15 is: 586,395.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,362.45 : 825,543.68 = 390,930.15 : x
  2. Step 2: Convert to fraction form
    550,362.45/825,543.68 = 390,930.15/x
  3. Step 3: Cross multiply
    550,362.45x = 825,543.68 × 390,930.15
  4. Step 4: Simplify right side
    550,362.45x = 322,729,912,699.30
  5. Step 5: Solve for x
    x = 322,729,912,699.30/550,362.45
  6. Step 6: Final answer
    x = 586,395.23

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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.