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Finding the Fourth Proportional to 708,290.45, 977,412.22 and 385,993.63

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Solution

The fourth proportional to 708,290.45, 977,412.22 and 385,993.63 is: 532,655.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,290.45 : 977,412.22 = 385,993.63 : x
  2. Step 2: Convert to fraction form
    708,290.45/977,412.22 = 385,993.63/x
  3. Step 3: Cross multiply
    708,290.45x = 977,412.22 × 385,993.63
  4. Step 4: Simplify right side
    708,290.45x = 377,274,888,311.97
  5. Step 5: Solve for x
    x = 377,274,888,311.97/708,290.45
  6. Step 6: Final answer
    x = 532,655.62

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Double scale
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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.