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Finding the Fourth Proportional to 388,012.08, 535,456.80 and 218,246.40

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Solution

The fourth proportional to 388,012.08, 535,456.80 and 218,246.40 is: 301,180.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,012.08 : 535,456.80 = 218,246.40 : x
  2. Step 2: Convert to fraction form
    388,012.08/535,456.80 = 218,246.40/x
  3. Step 3: Cross multiply
    388,012.08x = 535,456.80 × 218,246.40
  4. Step 4: Simplify right side
    388,012.08x = 116,861,518,955.52
  5. Step 5: Solve for x
    x = 116,861,518,955.52/388,012.08
  6. Step 6: Final answer
    x = 301,180.10

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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.