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Finding the Fourth Proportional to 897,663.60, 1,238,774.40 and 489,765.72

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Solution

The fourth proportional to 897,663.60, 1,238,774.40 and 489,765.72 is: 675,875.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    897,663.60 : 1,238,774.40 = 489,765.72 : x
  2. Step 2: Convert to fraction form
    897,663.60/1,238,774.40 = 489,765.72/x
  3. Step 3: Cross multiply
    897,663.60x = 1,238,774.40 × 489,765.72
  4. Step 4: Simplify right side
    897,663.60x = 606,709,235,933.57
  5. Step 5: Solve for x
    x = 606,709,235,933.57/897,663.60
  6. Step 6: Final answer
    x = 675,875.95

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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.