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Finding the Fourth Proportional to 255,617.80, 383,426.70 and 143,643.40

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Solution

The fourth proportional to 255,617.80, 383,426.70 and 143,643.40 is: 215,465.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,617.80 : 383,426.70 = 143,643.40 : x
  2. Step 2: Convert to fraction form
    255,617.80/383,426.70 = 143,643.40/x
  3. Step 3: Cross multiply
    255,617.80x = 383,426.70 × 143,643.40
  4. Step 4: Simplify right side
    255,617.80x = 55,076,714,838.78
  5. Step 5: Solve for x
    x = 55,076,714,838.78/255,617.80
  6. Step 6: Final answer
    x = 215,465.10

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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.