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Finding the Fourth Proportional to 328,420.16, 492,627.29 and 103,780.63

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Solution

The fourth proportional to 328,420.16, 492,627.29 and 103,780.63 is: 155,670.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,420.16 : 492,627.29 = 103,780.63 : x
  2. Step 2: Convert to fraction form
    328,420.16/492,627.29 = 103,780.63/x
  3. Step 3: Cross multiply
    328,420.16x = 492,627.29 × 103,780.63
  4. Step 4: Simplify right side
    328,420.16x = 51,125,170,511.39
  5. Step 5: Solve for x
    x = 51,125,170,511.39/328,420.16
  6. Step 6: Final answer
    x = 155,670.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.