Home / 712,622.20-983,418.42-390,352.36

Finding the Fourth Proportional to 712,622.20, 983,418.42 and 390,352.36

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Solution

The fourth proportional to 712,622.20, 983,418.42 and 390,352.36 is: 538,686.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,622.20 : 983,418.42 = 390,352.36 : x
  2. Step 2: Convert to fraction form
    712,622.20/983,418.42 = 390,352.36/x
  3. Step 3: Cross multiply
    712,622.20x = 983,418.42 × 390,352.36
  4. Step 4: Simplify right side
    712,622.20x = 383,879,701,114.47
  5. Step 5: Solve for x
    x = 383,879,701,114.47/712,622.20
  6. Step 6: Final answer
    x = 538,686.14

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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.