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Finding the Fourth Proportional to 388,068.75, 535,534.74 and 218,302.88

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Solution

The fourth proportional to 388,068.75, 535,534.74 and 218,302.88 is: 301,257.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,068.75 : 535,534.74 = 218,302.88 : x
  2. Step 2: Convert to fraction form
    388,068.75/535,534.74 = 218,302.88/x
  3. Step 3: Cross multiply
    388,068.75x = 535,534.74 × 218,302.88
  4. Step 4: Simplify right side
    388,068.75x = 116,908,773,404.38
  5. Step 5: Solve for x
    x = 116,908,773,404.38/388,068.75
  6. Step 6: Final answer
    x = 301,257.89

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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.