Home / 712,626.20-983,423.94-390,356.36

Finding the Fourth Proportional to 712,626.20, 983,423.94 and 390,356.36

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Solution

The fourth proportional to 712,626.20, 983,423.94 and 390,356.36 is: 538,691.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,626.20 : 983,423.94 = 390,356.36 : x
  2. Step 2: Convert to fraction form
    712,626.20/983,423.94 = 390,356.36/x
  3. Step 3: Cross multiply
    712,626.20x = 983,423.94 × 390,356.36
  4. Step 4: Simplify right side
    712,626.20x = 383,885,789,555.26
  5. Step 5: Solve for x
    x = 383,885,789,555.26/712,626.20
  6. Step 6: Final answer
    x = 538,691.66

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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.