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Finding the Fourth Proportional to 354,587.40, 489,394.08 and 211,356.72

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Solution

The fourth proportional to 354,587.40, 489,394.08 and 211,356.72 is: 291,710.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,587.40 : 489,394.08 = 211,356.72 : x
  2. Step 2: Convert to fraction form
    354,587.40/489,394.08 = 211,356.72/x
  3. Step 3: Cross multiply
    354,587.40x = 489,394.08 × 211,356.72
  4. Step 4: Simplify right side
    354,587.40x = 103,436,727,536.22
  5. Step 5: Solve for x
    x = 103,436,727,536.22/354,587.40
  6. Step 6: Final answer
    x = 291,710.10

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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.