Home / 712,499.09-983,249.08-390,229.45

Finding the Fourth Proportional to 712,499.09, 983,249.08 and 390,229.45

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Solution

The fourth proportional to 712,499.09, 983,249.08 and 390,229.45 is: 538,516.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,499.09 : 983,249.08 = 390,229.45 : x
  2. Step 2: Convert to fraction form
    712,499.09/983,249.08 = 390,229.45/x
  3. Step 3: Cross multiply
    712,499.09x = 983,249.08 × 390,229.45
  4. Step 4: Simplify right side
    712,499.09x = 383,692,744,267.71
  5. Step 5: Solve for x
    x = 383,692,744,267.71/712,499.09
  6. Step 6: Final answer
    x = 538,516.82

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Half scale
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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.