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Finding the Fourth Proportional to 476,851.20, 715,276.80 and 399,868.80

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Solution

The fourth proportional to 476,851.20, 715,276.80 and 399,868.80 is: 599,803.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    476,851.20 : 715,276.80 = 399,868.80 : x
  2. Step 2: Convert to fraction form
    476,851.20/715,276.80 = 399,868.80/x
  3. Step 3: Cross multiply
    476,851.20x = 715,276.80 × 399,868.80
  4. Step 4: Simplify right side
    476,851.20x = 286,016,875,683.84
  5. Step 5: Solve for x
    x = 286,016,875,683.84/476,851.20
  6. Step 6: Final answer
    x = 599,803.20

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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.