Home / 712,667.54-983,454.74-390,380.28

Finding the Fourth Proportional to 712,667.54, 983,454.74 and 390,380.28

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Solution

The fourth proportional to 712,667.54, 983,454.74 and 390,380.28 is: 538,710.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,667.54 : 983,454.74 = 390,380.28 : x
  2. Step 2: Convert to fraction form
    712,667.54/983,454.74 = 390,380.28/x
  3. Step 3: Cross multiply
    712,667.54x = 983,454.74 × 390,380.28
  4. Step 4: Simplify right side
    712,667.54x = 383,921,336,768.53
  5. Step 5: Solve for x
    x = 383,921,336,768.53/712,667.54
  6. Step 6: Final answer
    x = 538,710.29

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Similar ratio
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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.