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Finding the Fourth Proportional to 613,276.40, 919,914.60 and 424,319.60

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Solution

The fourth proportional to 613,276.40, 919,914.60 and 424,319.60 is: 636,479.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,276.40 : 919,914.60 = 424,319.60 : x
  2. Step 2: Convert to fraction form
    613,276.40/919,914.60 = 424,319.60/x
  3. Step 3: Cross multiply
    613,276.40x = 919,914.60 × 424,319.60
  4. Step 4: Simplify right side
    613,276.40x = 390,337,795,106.16
  5. Step 5: Solve for x
    x = 390,337,795,106.16/613,276.40
  6. Step 6: Final answer
    x = 636,479.40

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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.