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Finding the Fourth Proportional to 665,011.15, 997,656.93 and 215,697.07

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Solution

The fourth proportional to 665,011.15, 997,656.93 and 215,697.07 is: 323,591.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,011.15 : 997,656.93 = 215,697.07 : x
  2. Step 2: Convert to fraction form
    665,011.15/997,656.93 = 215,697.07/x
  3. Step 3: Cross multiply
    665,011.15x = 997,656.93 × 215,697.07
  4. Step 4: Simplify right side
    665,011.15x = 215,191,676,666.20
  5. Step 5: Solve for x
    x = 215,191,676,666.20/665,011.15
  6. Step 6: Final answer
    x = 323,591.08

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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.