Home / 712,403.60-983,087.45-390,108.15

Finding the Fourth Proportional to 712,403.60, 983,087.45 and 390,108.15

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Solution

The fourth proportional to 712,403.60, 983,087.45 and 390,108.15 is: 538,333.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,403.60 : 983,087.45 = 390,108.15 : x
  2. Step 2: Convert to fraction form
    712,403.60/983,087.45 = 390,108.15/x
  3. Step 3: Cross multiply
    712,403.60x = 983,087.45 × 390,108.15
  4. Step 4: Simplify right side
    712,403.60x = 383,510,422,974.73
  5. Step 5: Solve for x
    x = 383,510,422,974.73/712,403.60
  6. Step 6: Final answer
    x = 538,333.08

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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.