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Finding the Fourth Proportional to 286,751.60, 395,710.70 and 155,926.40

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Solution

The fourth proportional to 286,751.60, 395,710.70 and 155,926.40 is: 215,174.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,751.60 : 395,710.70 = 155,926.40 : x
  2. Step 2: Convert to fraction form
    286,751.60/395,710.70 = 155,926.40/x
  3. Step 3: Cross multiply
    286,751.60x = 395,710.70 × 155,926.40
  4. Step 4: Simplify right side
    286,751.60x = 61,701,744,892.48
  5. Step 5: Solve for x
    x = 61,701,744,892.48/286,751.60
  6. Step 6: Final answer
    x = 215,174.89

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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.