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Finding the Fourth Proportional to 709,023.03, 978,454.83 and 386,740.05

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Solution

The fourth proportional to 709,023.03, 978,454.83 and 386,740.05 is: 533,702.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,023.03 : 978,454.83 = 386,740.05 : x
  2. Step 2: Convert to fraction form
    709,023.03/978,454.83 = 386,740.05/x
  3. Step 3: Cross multiply
    709,023.03x = 978,454.83 × 386,740.05
  4. Step 4: Simplify right side
    709,023.03x = 378,407,669,876.94
  5. Step 5: Solve for x
    x = 378,407,669,876.94/709,023.03
  6. Step 6: Final answer
    x = 533,702.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.