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Finding the Fourth Proportional to 553,686.80, 830,530.20 and 413,718.80

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Solution

The fourth proportional to 553,686.80, 830,530.20 and 413,718.80 is: 620,578.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,686.80 : 830,530.20 = 413,718.80 : x
  2. Step 2: Convert to fraction form
    553,686.80/830,530.20 = 413,718.80/x
  3. Step 3: Cross multiply
    553,686.80x = 830,530.20 × 413,718.80
  4. Step 4: Simplify right side
    553,686.80x = 343,605,957,707.76
  5. Step 5: Solve for x
    x = 343,605,957,707.76/553,686.80
  6. Step 6: Final answer
    x = 620,578.20

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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.