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Finding the Fourth Proportional to 282,782.76, 390,240.21 and 155,458.37

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Solution

The fourth proportional to 282,782.76, 390,240.21 and 155,458.37 is: 214,532.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,782.76 : 390,240.21 = 155,458.37 : x
  2. Step 2: Convert to fraction form
    282,782.76/390,240.21 = 155,458.37/x
  3. Step 3: Cross multiply
    282,782.76x = 390,240.21 × 155,458.37
  4. Step 4: Simplify right side
    282,782.76x = 60,666,105,003.86
  5. Step 5: Solve for x
    x = 60,666,105,003.86/282,782.76
  6. Step 6: Final answer
    x = 214,532.54

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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.