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Finding the Fourth Proportional to 559,666.78, 772,342.74 and 317,962.60

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Solution

The fourth proportional to 559,666.78, 772,342.74 and 317,962.60 is: 438,789.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,666.78 : 772,342.74 = 317,962.60 : x
  2. Step 2: Convert to fraction form
    559,666.78/772,342.74 = 317,962.60/x
  3. Step 3: Cross multiply
    559,666.78x = 772,342.74 × 317,962.60
  4. Step 4: Simplify right side
    559,666.78x = 245,576,103,770.67
  5. Step 5: Solve for x
    x = 245,576,103,770.67/559,666.78
  6. Step 6: Final answer
    x = 438,789.85

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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.