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Finding the Fourth Proportional to 657,605.40, 986,506.65 and 278,525.40

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Solution

The fourth proportional to 657,605.40, 986,506.65 and 278,525.40 is: 417,829.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,605.40 : 986,506.65 = 278,525.40 : x
  2. Step 2: Convert to fraction form
    657,605.40/986,506.65 = 278,525.40/x
  3. Step 3: Cross multiply
    657,605.40x = 986,506.65 × 278,525.40
  4. Step 4: Simplify right side
    657,605.40x = 274,767,159,293.91
  5. Step 5: Solve for x
    x = 274,767,159,293.91/657,605.40
  6. Step 6: Final answer
    x = 417,829.84

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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.