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Finding the Fourth Proportional to 215,007.66, 320,697.39 and 186,705.15

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Solution

The fourth proportional to 215,007.66, 320,697.39 and 186,705.15 is: 278,482.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,007.66 : 320,697.39 = 186,705.15 : x
  2. Step 2: Convert to fraction form
    215,007.66/320,697.39 = 186,705.15/x
  3. Step 3: Cross multiply
    215,007.66x = 320,697.39 × 186,705.15
  4. Step 4: Simplify right side
    215,007.66x = 59,875,852,751.87
  5. Step 5: Solve for x
    x = 59,875,852,751.87/215,007.66
  6. Step 6: Final answer
    x = 278,482.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.