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Finding the Fourth Proportional to 708,679.90, 977,982.94 and 386,395.39

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Solution

The fourth proportional to 708,679.90, 977,982.94 and 386,395.39 is: 533,228.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,679.90 : 977,982.94 = 386,395.39 : x
  2. Step 2: Convert to fraction form
    708,679.90/977,982.94 = 386,395.39/x
  3. Step 3: Cross multiply
    708,679.90x = 977,982.94 × 386,395.39
  4. Step 4: Simplify right side
    708,679.90x = 377,888,099,514.65
  5. Step 5: Solve for x
    x = 377,888,099,514.65/708,679.90
  6. Step 6: Final answer
    x = 533,228.19

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1.5x scale

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.