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Finding the Fourth Proportional to 392,895.61, 585,904.80 and 389,304.07

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Solution

The fourth proportional to 392,895.61, 585,904.80 and 389,304.07 is: 580,548.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,895.61 : 585,904.80 = 389,304.07 : x
  2. Step 2: Convert to fraction form
    392,895.61/585,904.80 = 389,304.07/x
  3. Step 3: Cross multiply
    392,895.61x = 585,904.80 × 389,304.07
  4. Step 4: Simplify right side
    392,895.61x = 228,095,121,807.77
  5. Step 5: Solve for x
    x = 228,095,121,807.77/392,895.61
  6. Step 6: Final answer
    x = 580,548.92

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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.