Home / 873,653.40-1,310,480.10-312,485.40

Finding the Fourth Proportional to 873,653.40, 1,310,480.10 and 312,485.40

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Solution

The fourth proportional to 873,653.40, 1,310,480.10 and 312,485.40 is: 468,728.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    873,653.40 : 1,310,480.10 = 312,485.40 : x
  2. Step 2: Convert to fraction form
    873,653.40/1,310,480.10 = 312,485.40/x
  3. Step 3: Cross multiply
    873,653.40x = 1,310,480.10 × 312,485.40
  4. Step 4: Simplify right side
    873,653.40x = 409,505,898,240.54
  5. Step 5: Solve for x
    x = 409,505,898,240.54/873,653.40
  6. Step 6: Final answer
    x = 468,728.10

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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.