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Finding the Fourth Proportional to 897,409.20, 1,238,448 and 489,517.90

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Solution

The fourth proportional to 897,409.20, 1,238,448 and 489,517.90 is: 675,547.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    897,409.20 : 1,238,448 = 489,517.90 : x
  2. Step 2: Convert to fraction form
    897,409.20/1,238,448 = 489,517.90/x
  3. Step 3: Cross multiply
    897,409.20x = 1,238,448 × 489,517.90
  4. Step 4: Simplify right side
    897,409.20x = 606,242,464,219.20
  5. Step 5: Solve for x
    x = 606,242,464,219.20/897,409.20
  6. Step 6: Final answer
    x = 675,547.41

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Half scale
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Double scale
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Similar ratio
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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.