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Finding the Fourth Proportional to 708,290.78, 977,412.76 and 385,993.96

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Solution

The fourth proportional to 708,290.78, 977,412.76 and 385,993.96 is: 532,656.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,290.78 : 977,412.76 = 385,993.96 : x
  2. Step 2: Convert to fraction form
    708,290.78/977,412.76 = 385,993.96/x
  3. Step 3: Cross multiply
    708,290.78x = 977,412.76 × 385,993.96
  4. Step 4: Simplify right side
    708,290.78x = 377,275,421,786.93
  5. Step 5: Solve for x
    x = 377,275,421,786.93/708,290.78
  6. Step 6: Final answer
    x = 532,656.12

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Double scale
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Similar ratio
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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.