Home / 712,719.20-983,552.82-390,440.96

Finding the Fourth Proportional to 712,719.20, 983,552.82 and 390,440.96

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Solution

The fourth proportional to 712,719.20, 983,552.82 and 390,440.96 is: 538,808.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,719.20 : 983,552.82 = 390,440.96 : x
  2. Step 2: Convert to fraction form
    712,719.20/983,552.82 = 390,440.96/x
  3. Step 3: Cross multiply
    712,719.20x = 983,552.82 × 390,440.96
  4. Step 4: Simplify right side
    712,719.20x = 384,019,307,251.51
  5. Step 5: Solve for x
    x = 384,019,307,251.51/712,719.20
  6. Step 6: Final answer
    x = 538,808.70

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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.