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Finding the Fourth Proportional to 709,894.55, 979,647.05 and 387,603.65

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Solution

The fourth proportional to 709,894.55, 979,647.05 and 387,603.65 is: 534,888.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,894.55 : 979,647.05 = 387,603.65 : x
  2. Step 2: Convert to fraction form
    709,894.55/979,647.05 = 387,603.65/x
  3. Step 3: Cross multiply
    709,894.55x = 979,647.05 × 387,603.65
  4. Step 4: Simplify right side
    709,894.55x = 379,714,765,455.48
  5. Step 5: Solve for x
    x = 379,714,765,455.48/709,894.55
  6. Step 6: Final answer
    x = 534,888.97

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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.