Home / 712,511.22-983,265.48-390,222.08

Finding the Fourth Proportional to 712,511.22, 983,265.48 and 390,222.08

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Solution

The fourth proportional to 712,511.22, 983,265.48 and 390,222.08 is: 538,506.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,511.22 : 983,265.48 = 390,222.08 : x
  2. Step 2: Convert to fraction form
    712,511.22/983,265.48 = 390,222.08/x
  3. Step 3: Cross multiply
    712,511.22x = 983,265.48 × 390,222.08
  4. Step 4: Simplify right side
    712,511.22x = 383,691,900,797.80
  5. Step 5: Solve for x
    x = 383,691,900,797.80/712,511.22
  6. Step 6: Final answer
    x = 538,506.47

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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.