Home / 712,310.35-982,988.16-390,020.39

Finding the Fourth Proportional to 712,310.35, 982,988.16 and 390,020.39

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Solution

The fourth proportional to 712,310.35, 982,988.16 and 390,020.39 is: 538,228.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,310.35 : 982,988.16 = 390,020.39 : x
  2. Step 2: Convert to fraction form
    712,310.35/982,988.16 = 390,020.39/x
  3. Step 3: Cross multiply
    712,310.35x = 982,988.16 × 390,020.39
  4. Step 4: Simplify right side
    712,310.35x = 383,385,425,528.58
  5. Step 5: Solve for x
    x = 383,385,425,528.58/712,310.35
  6. Step 6: Final answer
    x = 538,228.07

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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.