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Finding the Fourth Proportional to 309,700.80, 427,384.80 and 175,569.60

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Solution

The fourth proportional to 309,700.80, 427,384.80 and 175,569.60 is: 242,284.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,700.80 : 427,384.80 = 175,569.60 : x
  2. Step 2: Convert to fraction form
    309,700.80/427,384.80 = 175,569.60/x
  3. Step 3: Cross multiply
    309,700.80x = 427,384.80 × 175,569.60
  4. Step 4: Simplify right side
    309,700.80x = 75,035,778,382.08
  5. Step 5: Solve for x
    x = 75,035,778,382.08/309,700.80
  6. Step 6: Final answer
    x = 242,284.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.