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Finding the Fourth Proportional to 646,718.40, 970,077.60 and 489,254.40

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Solution

The fourth proportional to 646,718.40, 970,077.60 and 489,254.40 is: 733,881.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,718.40 : 970,077.60 = 489,254.40 : x
  2. Step 2: Convert to fraction form
    646,718.40/970,077.60 = 489,254.40/x
  3. Step 3: Cross multiply
    646,718.40x = 970,077.60 × 489,254.40
  4. Step 4: Simplify right side
    646,718.40x = 474,614,734,141.44
  5. Step 5: Solve for x
    x = 474,614,734,141.44/646,718.40
  6. Step 6: Final answer
    x = 733,881.60

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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.