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Finding the Fourth Proportional to 355,030.86, 489,948.92 and 217,232.77

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Solution

The fourth proportional to 355,030.86, 489,948.92 and 217,232.77 is: 299,785.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,030.86 : 489,948.92 = 217,232.77 : x
  2. Step 2: Convert to fraction form
    355,030.86/489,948.92 = 217,232.77/x
  3. Step 3: Cross multiply
    355,030.86x = 489,948.92 × 217,232.77
  4. Step 4: Simplify right side
    355,030.86x = 106,432,961,050.11
  5. Step 5: Solve for x
    x = 106,432,961,050.11/355,030.86
  6. Step 6: Final answer
    x = 299,785.10

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1.5x scale

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.