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Finding the Fourth Proportional to 258,430.80, 388,510.20 and 224,216.40

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Solution

The fourth proportional to 258,430.80, 388,510.20 and 224,216.40 is: 337,074.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,430.80 : 388,510.20 = 224,216.40 : x
  2. Step 2: Convert to fraction form
    258,430.80/388,510.20 = 224,216.40/x
  3. Step 3: Cross multiply
    258,430.80x = 388,510.20 × 224,216.40
  4. Step 4: Simplify right side
    258,430.80x = 87,110,358,407.28
  5. Step 5: Solve for x
    x = 87,110,358,407.28/258,430.80
  6. Step 6: Final answer
    x = 337,074.21

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1.5x scale

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.