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Finding the Fourth Proportional to 615,575.16, 849,508.11 and 386,142.21

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Solution

The fourth proportional to 615,575.16, 849,508.11 and 386,142.21 is: 532,885.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,575.16 : 849,508.11 = 386,142.21 : x
  2. Step 2: Convert to fraction form
    615,575.16/849,508.11 = 386,142.21/x
  3. Step 3: Cross multiply
    615,575.16x = 849,508.11 × 386,142.21
  4. Step 4: Simplify right side
    615,575.16x = 328,030,939,008.32
  5. Step 5: Solve for x
    x = 328,030,939,008.32/615,575.16
  6. Step 6: Final answer
    x = 532,885.28

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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.