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Finding the Fourth Proportional to 489,934.40, 734,901.60 and 406,990.40

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Solution

The fourth proportional to 489,934.40, 734,901.60 and 406,990.40 is: 610,485.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,934.40 : 734,901.60 = 406,990.40 : x
  2. Step 2: Convert to fraction form
    489,934.40/734,901.60 = 406,990.40/x
  3. Step 3: Cross multiply
    489,934.40x = 734,901.60 × 406,990.40
  4. Step 4: Simplify right side
    489,934.40x = 299,097,896,144.64
  5. Step 5: Solve for x
    x = 299,097,896,144.64/489,934.40
  6. Step 6: Final answer
    x = 610,485.60

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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.