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Finding the Fourth Proportional to 388,512.79, 536,139.54 and 216,430.52

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Solution

The fourth proportional to 388,512.79, 536,139.54 and 216,430.52 is: 298,669.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,512.79 : 536,139.54 = 216,430.52 : x
  2. Step 2: Convert to fraction form
    388,512.79/536,139.54 = 216,430.52/x
  3. Step 3: Cross multiply
    388,512.79x = 536,139.54 × 216,430.52
  4. Step 4: Simplify right side
    388,512.79x = 116,036,956,754.06
  5. Step 5: Solve for x
    x = 116,036,956,754.06/388,512.79
  6. Step 6: Final answer
    x = 298,669.59

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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.