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Finding the Fourth Proportional to 326,218.70, 489,328.05 and 292,004.30

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Solution

The fourth proportional to 326,218.70, 489,328.05 and 292,004.30 is: 438,006.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,218.70 : 489,328.05 = 292,004.30 : x
  2. Step 2: Convert to fraction form
    326,218.70/489,328.05 = 292,004.30/x
  3. Step 3: Cross multiply
    326,218.70x = 489,328.05 × 292,004.30
  4. Step 4: Simplify right side
    326,218.70x = 142,885,894,710.62
  5. Step 5: Solve for x
    x = 142,885,894,710.62/326,218.70
  6. Step 6: Final answer
    x = 438,006.45

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1.5x scale

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.