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Finding the Fourth Proportional to 255,615.80, 383,423.70 and 143,641.40

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Solution

The fourth proportional to 255,615.80, 383,423.70 and 143,641.40 is: 215,462.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,615.80 : 383,423.70 = 143,641.40 : x
  2. Step 2: Convert to fraction form
    255,615.80/383,423.70 = 143,641.40/x
  3. Step 3: Cross multiply
    255,615.80x = 383,423.70 × 143,641.40
  4. Step 4: Simplify right side
    255,615.80x = 55,075,517,061.18
  5. Step 5: Solve for x
    x = 55,075,517,061.18/255,615.80
  6. Step 6: Final answer
    x = 215,462.10

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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.