Home / 1,378,690.72-1,902,565.91-766,830.31

Finding the Fourth Proportional to 1,378,690.72, 1,902,565.91 and 766,830.31

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Solution

The fourth proportional to 1,378,690.72, 1,902,565.91 and 766,830.31 is: 1,058,210.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378,690.72 : 1,902,565.91 = 766,830.31 : x
  2. Step 2: Convert to fraction form
    1,378,690.72/1,902,565.91 = 766,830.31/x
  3. Step 3: Cross multiply
    1,378,690.72x = 1,902,565.91 × 766,830.31
  4. Step 4: Simplify right side
    1,378,690.72x = 1,458,945,209,400.07
  5. Step 5: Solve for x
    x = 1,458,945,209,400.07/1,378,690.72
  6. Step 6: Final answer
    x = 1,058,210.65

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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.