Home / 712,737.39-983,578.79-390,440.46

Finding the Fourth Proportional to 712,737.39, 983,578.79 and 390,440.46

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Solution

The fourth proportional to 712,737.39, 983,578.79 and 390,440.46 is: 538,808.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,737.39 : 983,578.79 = 390,440.46 : x
  2. Step 2: Convert to fraction form
    712,737.39/983,578.79 = 390,440.46/x
  3. Step 3: Cross multiply
    712,737.39x = 983,578.79 × 390,440.46
  4. Step 4: Simplify right side
    712,737.39x = 384,028,948,343.75
  5. Step 5: Solve for x
    x = 384,028,948,343.75/712,737.39
  6. Step 6: Final answer
    x = 538,808.48

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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.