Home / 712,624.54-983,422.29-390,340.03

Finding the Fourth Proportional to 712,624.54, 983,422.29 and 390,340.03

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Solution

The fourth proportional to 712,624.54, 983,422.29 and 390,340.03 is: 538,669.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,624.54 : 983,422.29 = 390,340.03 : x
  2. Step 2: Convert to fraction form
    712,624.54/983,422.29 = 390,340.03/x
  3. Step 3: Cross multiply
    712,624.54x = 983,422.29 × 390,340.03
  4. Step 4: Simplify right side
    712,624.54x = 383,869,086,181.27
  5. Step 5: Solve for x
    x = 383,869,086,181.27/712,624.54
  6. Step 6: Final answer
    x = 538,669.47

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Double scale
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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.