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Finding the Fourth Proportional to 326,683.40, 489,368.99 and 148,945.91

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Solution

The fourth proportional to 326,683.40, 489,368.99 and 148,945.91 is: 223,119.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,683.40 : 489,368.99 = 148,945.91 : x
  2. Step 2: Convert to fraction form
    326,683.40/489,368.99 = 148,945.91/x
  3. Step 3: Cross multiply
    326,683.40x = 489,368.99 × 148,945.91
  4. Step 4: Simplify right side
    326,683.40x = 72,889,506,349.76
  5. Step 5: Solve for x
    x = 72,889,506,349.76/326,683.40
  6. Step 6: Final answer
    x = 223,119.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.