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Finding the Fourth Proportional to 388,965.60, 583,448.40 and 372,376.80

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Solution

The fourth proportional to 388,965.60, 583,448.40 and 372,376.80 is: 558,565.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,965.60 : 583,448.40 = 372,376.80 : x
  2. Step 2: Convert to fraction form
    388,965.60/583,448.40 = 372,376.80/x
  3. Step 3: Cross multiply
    388,965.60x = 583,448.40 × 372,376.80
  4. Step 4: Simplify right side
    388,965.60x = 217,262,648,157.12
  5. Step 5: Solve for x
    x = 217,262,648,157.12/388,965.60
  6. Step 6: Final answer
    x = 558,565.20

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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.