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Finding the Fourth Proportional to 386,904.60, 534,127.50 and 300,670.20

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Solution

The fourth proportional to 386,904.60, 534,127.50 and 300,670.20 is: 415,079.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,904.60 : 534,127.50 = 300,670.20 : x
  2. Step 2: Convert to fraction form
    386,904.60/534,127.50 = 300,670.20/x
  3. Step 3: Cross multiply
    386,904.60x = 534,127.50 × 300,670.20
  4. Step 4: Simplify right side
    386,904.60x = 160,596,222,250.50
  5. Step 5: Solve for x
    x = 160,596,222,250.50/386,904.60
  6. Step 6: Final answer
    x = 415,079.64

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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.