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Finding the Fourth Proportional to 382,972.80, 574,718.40 and 172,502.40

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Solution

The fourth proportional to 382,972.80, 574,718.40 and 172,502.40 is: 258,870.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,972.80 : 574,718.40 = 172,502.40 : x
  2. Step 2: Convert to fraction form
    382,972.80/574,718.40 = 172,502.40/x
  3. Step 3: Cross multiply
    382,972.80x = 574,718.40 × 172,502.40
  4. Step 4: Simplify right side
    382,972.80x = 99,140,303,324.16
  5. Step 5: Solve for x
    x = 99,140,303,324.16/382,972.80
  6. Step 6: Final answer
    x = 258,870.35

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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.