Home / 712,725.32-983,561.10-390,447.02

Finding the Fourth Proportional to 712,725.32, 983,561.10 and 390,447.02

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Solution

The fourth proportional to 712,725.32, 983,561.10 and 390,447.02 is: 538,816.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,725.32 : 983,561.10 = 390,447.02 : x
  2. Step 2: Convert to fraction form
    712,725.32/983,561.10 = 390,447.02/x
  3. Step 3: Cross multiply
    712,725.32x = 983,561.10 × 390,447.02
  4. Step 4: Simplify right side
    712,725.32x = 384,028,500,482.92
  5. Step 5: Solve for x
    x = 384,028,500,482.92/712,725.32
  6. Step 6: Final answer
    x = 538,816.97

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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.