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Finding the Fourth Proportional to 978,195.40, 1,349,784.94 and 570,195.16

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Solution

The fourth proportional to 978,195.40, 1,349,784.94 and 570,195.16 is: 786,796.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,195.40 : 1,349,784.94 = 570,195.16 : x
  2. Step 2: Convert to fraction form
    978,195.40/1,349,784.94 = 570,195.16/x
  3. Step 3: Cross multiply
    978,195.40x = 1,349,784.94 × 570,195.16
  4. Step 4: Simplify right side
    978,195.40x = 769,640,839,828.89
  5. Step 5: Solve for x
    x = 769,640,839,828.89/978,195.40
  6. Step 6: Final answer
    x = 786,796.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.