Home / 712,600.13-983,388.43-390,315.61

Finding the Fourth Proportional to 712,600.13, 983,388.43 and 390,315.61

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Solution

The fourth proportional to 712,600.13, 983,388.43 and 390,315.61 is: 538,635.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,600.13 : 983,388.43 = 390,315.61 : x
  2. Step 2: Convert to fraction form
    712,600.13/983,388.43 = 390,315.61/x
  3. Step 3: Cross multiply
    712,600.13x = 983,388.43 × 390,315.61
  4. Step 4: Simplify right side
    712,600.13x = 383,831,850,005.45
  5. Step 5: Solve for x
    x = 383,831,850,005.45/712,600.13
  6. Step 6: Final answer
    x = 538,635.68

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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.