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Finding the Fourth Proportional to 615,312.11, 849,108.57 and 385,992.86

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Solution

The fourth proportional to 615,312.11, 849,108.57 and 385,992.86 is: 532,656.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,312.11 : 849,108.57 = 385,992.86 : x
  2. Step 2: Convert to fraction form
    615,312.11/849,108.57 = 385,992.86/x
  3. Step 3: Cross multiply
    615,312.11x = 849,108.57 × 385,992.86
  4. Step 4: Simplify right side
    615,312.11x = 327,749,846,639.24
  5. Step 5: Solve for x
    x = 327,749,846,639.24/615,312.11
  6. Step 6: Final answer
    x = 532,656.26

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Double scale
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Similar ratio
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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.