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Finding the Fourth Proportional to 911,894.13, 1,258,374.69 and 503,974.89

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Solution

The fourth proportional to 911,894.13, 1,258,374.69 and 503,974.89 is: 695,463.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,894.13 : 1,258,374.69 = 503,974.89 : x
  2. Step 2: Convert to fraction form
    911,894.13/1,258,374.69 = 503,974.89/x
  3. Step 3: Cross multiply
    911,894.13x = 1,258,374.69 × 503,974.89
  4. Step 4: Simplify right side
    911,894.13x = 634,189,245,971.53
  5. Step 5: Solve for x
    x = 634,189,245,971.53/911,894.13
  6. Step 6: Final answer
    x = 695,463.68

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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.