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Finding the Fourth Proportional to 388,781.56, 536,516.16 and 219,070.36

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Solution

The fourth proportional to 388,781.56, 536,516.16 and 219,070.36 is: 302,315.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,781.56 : 536,516.16 = 219,070.36 : x
  2. Step 2: Convert to fraction form
    388,781.56/536,516.16 = 219,070.36/x
  3. Step 3: Cross multiply
    388,781.56x = 536,516.16 × 219,070.36
  4. Step 4: Simplify right side
    388,781.56x = 117,534,788,317.02
  5. Step 5: Solve for x
    x = 117,534,788,317.02/388,781.56
  6. Step 6: Final answer
    x = 302,315.75

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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.