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Finding the Fourth Proportional to 190,641.60, 285,616.80 and 155,390.40

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Solution

The fourth proportional to 190,641.60, 285,616.80 and 155,390.40 is: 232,803.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,641.60 : 285,616.80 = 155,390.40 : x
  2. Step 2: Convert to fraction form
    190,641.60/285,616.80 = 155,390.40/x
  3. Step 3: Cross multiply
    190,641.60x = 285,616.80 × 155,390.40
  4. Step 4: Simplify right side
    190,641.60x = 44,382,108,798.72
  5. Step 5: Solve for x
    x = 44,382,108,798.72/190,641.60
  6. Step 6: Final answer
    x = 232,803.90

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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.