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Finding the Fourth Proportional to 501,505.12, 691,556.74 and 429,147.45

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Solution

The fourth proportional to 501,505.12, 691,556.74 and 429,147.45 is: 591,778.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    501,505.12 : 691,556.74 = 429,147.45 : x
  2. Step 2: Convert to fraction form
    501,505.12/691,556.74 = 429,147.45/x
  3. Step 3: Cross multiply
    501,505.12x = 691,556.74 × 429,147.45
  4. Step 4: Simplify right side
    501,505.12x = 296,779,810,428.44
  5. Step 5: Solve for x
    x = 296,779,810,428.44/501,505.12
  6. Step 6: Final answer
    x = 591,778.22

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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.