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Finding the Fourth Proportional to 282,693.70, 390,100.80 and 155,369.39

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Solution

The fourth proportional to 282,693.70, 390,100.80 and 155,369.39 is: 214,400.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,693.70 : 390,100.80 = 155,369.39 : x
  2. Step 2: Convert to fraction form
    282,693.70/390,100.80 = 155,369.39/x
  3. Step 3: Cross multiply
    282,693.70x = 390,100.80 × 155,369.39
  4. Step 4: Simplify right side
    282,693.70x = 60,609,723,334.51
  5. Step 5: Solve for x
    x = 60,609,723,334.51/282,693.70
  6. Step 6: Final answer
    x = 214,400.69

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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.