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Finding the Fourth Proportional to 897,624.54, 1,238,678.54 and 489,702.06

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Solution

The fourth proportional to 897,624.54, 1,238,678.54 and 489,702.06 is: 675,765.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    897,624.54 : 1,238,678.54 = 489,702.06 : x
  2. Step 2: Convert to fraction form
    897,624.54/1,238,678.54 = 489,702.06/x
  3. Step 3: Cross multiply
    897,624.54x = 1,238,678.54 × 489,702.06
  4. Step 4: Simplify right side
    897,624.54x = 606,583,432,715.79
  5. Step 5: Solve for x
    x = 606,583,432,715.79/897,624.54
  6. Step 6: Final answer
    x = 675,765.21

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Double scale
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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.