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Finding the Fourth Proportional to 615,935.40, 923,903.10 and 405,810.60

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Solution

The fourth proportional to 615,935.40, 923,903.10 and 405,810.60 is: 608,715.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,935.40 : 923,903.10 = 405,810.60 : x
  2. Step 2: Convert to fraction form
    615,935.40/923,903.10 = 405,810.60/x
  3. Step 3: Cross multiply
    615,935.40x = 923,903.10 × 405,810.60
  4. Step 4: Simplify right side
    615,935.40x = 374,929,671,352.86
  5. Step 5: Solve for x
    x = 374,929,671,352.86/615,935.40
  6. Step 6: Final answer
    x = 608,715.90

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1.5x scale

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.