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Finding the Fourth Proportional to 388,318.92, 535,421.58 and 265,870.68

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Solution

The fourth proportional to 388,318.92, 535,421.58 and 265,870.68 is: 366,587.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,318.92 : 535,421.58 = 265,870.68 : x
  2. Step 2: Convert to fraction form
    388,318.92/535,421.58 = 265,870.68/x
  3. Step 3: Cross multiply
    388,318.92x = 535,421.58 × 265,870.68
  4. Step 4: Simplify right side
    388,318.92x = 142,352,895,554.81
  5. Step 5: Solve for x
    x = 142,352,895,554.81/388,318.92
  6. Step 6: Final answer
    x = 366,587.59

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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.