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Finding the Fourth Proportional to 835,339.60, 1,253,009.40 and 415,435.60

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Solution

The fourth proportional to 835,339.60, 1,253,009.40 and 415,435.60 is: 623,153.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    835,339.60 : 1,253,009.40 = 415,435.60 : x
  2. Step 2: Convert to fraction form
    835,339.60/1,253,009.40 = 415,435.60/x
  3. Step 3: Cross multiply
    835,339.60x = 1,253,009.40 × 415,435.60
  4. Step 4: Simplify right side
    835,339.60x = 520,544,711,894.64
  5. Step 5: Solve for x
    x = 520,544,711,894.64/835,339.60
  6. Step 6: Final answer
    x = 623,153.40

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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.