Home / 712,884.76-983,780.77-390,607.09

Finding the Fourth Proportional to 712,884.76, 983,780.77 and 390,607.09

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Solution

The fourth proportional to 712,884.76, 983,780.77 and 390,607.09 is: 539,037.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,884.76 : 983,780.77 = 390,607.09 : x
  2. Step 2: Convert to fraction form
    712,884.76/983,780.77 = 390,607.09/x
  3. Step 3: Cross multiply
    712,884.76x = 983,780.77 × 390,607.09
  4. Step 4: Simplify right side
    712,884.76x = 384,271,743,767.66
  5. Step 5: Solve for x
    x = 384,271,743,767.66/712,884.76
  6. Step 6: Final answer
    x = 539,037.68

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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.