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Finding the Fourth Proportional to 388,412.48, 536,019.36 and 218,652.80

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Solution

The fourth proportional to 388,412.48, 536,019.36 and 218,652.80 is: 301,746.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,412.48 : 536,019.36 = 218,652.80 : x
  2. Step 2: Convert to fraction form
    388,412.48/536,019.36 = 218,652.80/x
  3. Step 3: Cross multiply
    388,412.48x = 536,019.36 × 218,652.80
  4. Step 4: Simplify right side
    388,412.48x = 117,202,133,918.21
  5. Step 5: Solve for x
    x = 117,202,133,918.21/388,412.48
  6. Step 6: Final answer
    x = 301,746.57

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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.