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Finding the Fourth Proportional to 644,085.15, 888,865.25 and 357,605.25

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Solution

The fourth proportional to 644,085.15, 888,865.25 and 357,605.25 is: 493,510.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,085.15 : 888,865.25 = 357,605.25 : x
  2. Step 2: Convert to fraction form
    644,085.15/888,865.25 = 357,605.25/x
  3. Step 3: Cross multiply
    644,085.15x = 888,865.25 × 357,605.25
  4. Step 4: Simplify right side
    644,085.15x = 317,862,878,154.54
  5. Step 5: Solve for x
    x = 317,862,878,154.54/644,085.15
  6. Step 6: Final answer
    x = 493,510.65

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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.