Home / 712,738.86-983,604.12-390,448.88

Finding the Fourth Proportional to 712,738.86, 983,604.12 and 390,448.88

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Solution

The fourth proportional to 712,738.86, 983,604.12 and 390,448.88 is: 538,832.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,738.86 : 983,604.12 = 390,448.88 : x
  2. Step 2: Convert to fraction form
    712,738.86/983,604.12 = 390,448.88/x
  3. Step 3: Cross multiply
    712,738.86x = 983,604.12 × 390,448.88
  4. Step 4: Simplify right side
    712,738.86x = 384,047,127,017.39
  5. Step 5: Solve for x
    x = 384,047,127,017.39/712,738.86
  6. Step 6: Final answer
    x = 538,832.87

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Double scale
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Similar ratio
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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.