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Finding the Fourth Proportional to 712,496.52, 983,256.30 and 390,200.76

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Solution

The fourth proportional to 712,496.52, 983,256.30 and 390,200.76 is: 538,483.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,496.52 : 983,256.30 = 390,200.76 : x
  2. Step 2: Convert to fraction form
    712,496.52/983,256.30 = 390,200.76/x
  3. Step 3: Cross multiply
    712,496.52x = 983,256.30 × 390,200.76
  4. Step 4: Simplify right side
    712,496.52x = 383,667,355,534.79
  5. Step 5: Solve for x
    x = 383,667,355,534.79/712,496.52
  6. Step 6: Final answer
    x = 538,483.13

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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.