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Finding the Fourth Proportional to 501,019.84, 691,393.08 and 286,155.48

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Solution

The fourth proportional to 501,019.84, 691,393.08 and 286,155.48 is: 394,886.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    501,019.84 : 691,393.08 = 286,155.48 : x
  2. Step 2: Convert to fraction form
    501,019.84/691,393.08 = 286,155.48/x
  3. Step 3: Cross multiply
    501,019.84x = 691,393.08 × 286,155.48
  4. Step 4: Simplify right side
    501,019.84x = 197,845,918,676.08
  5. Step 5: Solve for x
    x = 197,845,918,676.08/501,019.84
  6. Step 6: Final answer
    x = 394,886.40

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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.