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Finding the Fourth Proportional to 656,930.80, 983,427.90 and 390,554.20

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Solution

The fourth proportional to 656,930.80, 983,427.90 and 390,554.20 is: 584,661.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,930.80 : 983,427.90 = 390,554.20 : x
  2. Step 2: Convert to fraction form
    656,930.80/983,427.90 = 390,554.20/x
  3. Step 3: Cross multiply
    656,930.80x = 983,427.90 × 390,554.20
  4. Step 4: Simplify right side
    656,930.80x = 384,081,896,742.18
  5. Step 5: Solve for x
    x = 384,081,896,742.18/656,930.80
  6. Step 6: Final answer
    x = 584,661.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.