Home / 712,319.17-983,000.69-390,049.68

Finding the Fourth Proportional to 712,319.17, 983,000.69 and 390,049.68

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Solution

The fourth proportional to 712,319.17, 983,000.69 and 390,049.68 is: 538,268.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,319.17 : 983,000.69 = 390,049.68 : x
  2. Step 2: Convert to fraction form
    712,319.17/983,000.69 = 390,049.68/x
  3. Step 3: Cross multiply
    712,319.17x = 983,000.69 × 390,049.68
  4. Step 4: Simplify right side
    712,319.17x = 383,419,104,574.28
  5. Step 5: Solve for x
    x = 383,419,104,574.28/712,319.17
  6. Step 6: Final answer
    x = 538,268.69

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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.