Home / 712,724.16-983,560.51-390,427.19

Finding the Fourth Proportional to 712,724.16, 983,560.51 and 390,427.19

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Solution

The fourth proportional to 712,724.16, 983,560.51 and 390,427.19 is: 538,790.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,724.16 : 983,560.51 = 390,427.19 : x
  2. Step 2: Convert to fraction form
    712,724.16/983,560.51 = 390,427.19/x
  3. Step 3: Cross multiply
    712,724.16x = 983,560.51 × 390,427.19
  4. Step 4: Simplify right side
    712,724.16x = 384,008,759,244.33
  5. Step 5: Solve for x
    x = 384,008,759,244.33/712,724.16
  6. Step 6: Final answer
    x = 538,790.15

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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.