Home / 712,391.46-983,100.51-390,121.62

Finding the Fourth Proportional to 712,391.46, 983,100.51 and 390,121.62

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Solution

The fourth proportional to 712,391.46, 983,100.51 and 390,121.62 is: 538,368.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,391.46 : 983,100.51 = 390,121.62 : x
  2. Step 2: Convert to fraction form
    712,391.46/983,100.51 = 390,121.62/x
  3. Step 3: Cross multiply
    712,391.46x = 983,100.51 × 390,121.62
  4. Step 4: Simplify right side
    712,391.46x = 383,528,763,584.03
  5. Step 5: Solve for x
    x = 383,528,763,584.03/712,391.46
  6. Step 6: Final answer
    x = 538,368.00

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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.