Home / 662,017.36-913,651.20-390,172.80

Finding the Fourth Proportional to 662,017.36, 913,651.20 and 390,172.80

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Solution

The fourth proportional to 662,017.36, 913,651.20 and 390,172.80 is: 538,478.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,017.36 : 913,651.20 = 390,172.80 : x
  2. Step 2: Convert to fraction form
    662,017.36/913,651.20 = 390,172.80/x
  3. Step 3: Cross multiply
    662,017.36x = 913,651.20 × 390,172.80
  4. Step 4: Simplify right side
    662,017.36x = 356,481,846,927.36
  5. Step 5: Solve for x
    x = 356,481,846,927.36/662,017.36
  6. Step 6: Final answer
    x = 538,478.10

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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.