Home / 712,422.87-983,114.01-390,127.41

Finding the Fourth Proportional to 712,422.87, 983,114.01 and 390,127.41

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Solution

The fourth proportional to 712,422.87, 983,114.01 and 390,127.41 is: 538,359.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,422.87 : 983,114.01 = 390,127.41 : x
  2. Step 2: Convert to fraction form
    712,422.87/983,114.01 = 390,127.41/x
  3. Step 3: Cross multiply
    712,422.87x = 983,114.01 × 390,127.41
  4. Step 4: Simplify right side
    712,422.87x = 383,539,722,456.01
  5. Step 5: Solve for x
    x = 383,539,722,456.01/712,422.87
  6. Step 6: Final answer
    x = 538,359.64

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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.