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Finding the Fourth Proportional to 489,935.40, 734,903.10 and 406,991.40

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Solution

The fourth proportional to 489,935.40, 734,903.10 and 406,991.40 is: 610,487.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,935.40 : 734,903.10 = 406,991.40 : x
  2. Step 2: Convert to fraction form
    489,935.40/734,903.10 = 406,991.40/x
  3. Step 3: Cross multiply
    489,935.40x = 734,903.10 × 406,991.40
  4. Step 4: Simplify right side
    489,935.40x = 299,099,241,533.34
  5. Step 5: Solve for x
    x = 299,099,241,533.34/489,935.40
  6. Step 6: Final answer
    x = 610,487.10

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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.