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Finding the Fourth Proportional to 388,495.76, 536,109.68 and 216,409.60

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Solution

The fourth proportional to 388,495.76, 536,109.68 and 216,409.60 is: 298,637.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,495.76 : 536,109.68 = 216,409.60 : x
  2. Step 2: Convert to fraction form
    388,495.76/536,109.68 = 216,409.60/x
  3. Step 3: Cross multiply
    388,495.76x = 536,109.68 × 216,409.60
  4. Step 4: Simplify right side
    388,495.76x = 116,019,281,404.93
  5. Step 5: Solve for x
    x = 116,019,281,404.93/388,495.76
  6. Step 6: Final answer
    x = 298,637.19

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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.