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Finding the Fourth Proportional to 978,405.30, 1,465,793.55 and 556,427.70

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Solution

The fourth proportional to 978,405.30, 1,465,793.55 and 556,427.70 is: 833,609.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,405.30 : 1,465,793.55 = 556,427.70 : x
  2. Step 2: Convert to fraction form
    978,405.30/1,465,793.55 = 556,427.70/x
  3. Step 3: Cross multiply
    978,405.30x = 1,465,793.55 × 556,427.70
  4. Step 4: Simplify right side
    978,405.30x = 815,608,133,701.34
  5. Step 5: Solve for x
    x = 815,608,133,701.34/978,405.30
  6. Step 6: Final answer
    x = 833,609.68

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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.