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Finding the Fourth Proportional to 325,929.80, 489,477.90 and 315,432.20

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Solution

The fourth proportional to 325,929.80, 489,477.90 and 315,432.20 is: 473,712.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,929.80 : 489,477.90 = 315,432.20 : x
  2. Step 2: Convert to fraction form
    325,929.80/489,477.90 = 315,432.20/x
  3. Step 3: Cross multiply
    325,929.80x = 489,477.90 × 315,432.20
  4. Step 4: Simplify right side
    325,929.80x = 154,397,090,848.38
  5. Step 5: Solve for x
    x = 154,397,090,848.38/325,929.80
  6. Step 6: Final answer
    x = 473,712.72

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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.