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Finding the Fourth Proportional to 489,903.90, 734,666.91 and 190,345.04

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Solution

The fourth proportional to 489,903.90, 734,666.91 and 190,345.04 is: 285,444.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,903.90 : 734,666.91 = 190,345.04 : x
  2. Step 2: Convert to fraction form
    489,903.90/734,666.91 = 190,345.04/x
  3. Step 3: Cross multiply
    489,903.90x = 734,666.91 × 190,345.04
  4. Step 4: Simplify right side
    489,903.90x = 139,840,201,809.19
  5. Step 5: Solve for x
    x = 139,840,201,809.19/489,903.90
  6. Step 6: Final answer
    x = 285,444.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.