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Finding the Fourth Proportional to 685,448.84, 945,918.64 and 383,642.84

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Solution

The fourth proportional to 685,448.84, 945,918.64 and 383,642.84 is: 529,426.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,448.84 : 945,918.64 = 383,642.84 : x
  2. Step 2: Convert to fraction form
    685,448.84/945,918.64 = 383,642.84/x
  3. Step 3: Cross multiply
    685,448.84x = 945,918.64 × 383,642.84
  4. Step 4: Simplify right side
    685,448.84x = 362,894,916,302.89
  5. Step 5: Solve for x
    x = 362,894,916,302.89/685,448.84
  6. Step 6: Final answer
    x = 529,426.70

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Double scale
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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.