Home / 712,604.13-983,393.94-390,319.62

Finding the Fourth Proportional to 712,604.13, 983,393.94 and 390,319.62

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Solution

The fourth proportional to 712,604.13, 983,393.94 and 390,319.62 is: 538,641.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,604.13 : 983,393.94 = 390,319.62 : x
  2. Step 2: Convert to fraction form
    712,604.13/983,393.94 = 390,319.62/x
  3. Step 3: Cross multiply
    712,604.13x = 983,393.94 × 390,319.62
  4. Step 4: Simplify right side
    712,604.13x = 383,837,948,971.10
  5. Step 5: Solve for x
    x = 383,837,948,971.10/712,604.13
  6. Step 6: Final answer
    x = 538,641.21

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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.