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Finding the Fourth Proportional to 608,840.90, 913,261.35 and 328,904.90

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Solution

The fourth proportional to 608,840.90, 913,261.35 and 328,904.90 is: 493,357.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,840.90 : 913,261.35 = 328,904.90 : x
  2. Step 2: Convert to fraction form
    608,840.90/913,261.35 = 328,904.90/x
  3. Step 3: Cross multiply
    608,840.90x = 913,261.35 × 328,904.90
  4. Step 4: Simplify right side
    608,840.90x = 300,376,132,995.62
  5. Step 5: Solve for x
    x = 300,376,132,995.62/608,840.90
  6. Step 6: Final answer
    x = 493,357.35

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.