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Finding the Fourth Proportional to 665,354.98, 998,031.46 and 266,089.38

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Solution

The fourth proportional to 665,354.98, 998,031.46 and 266,089.38 is: 399,133.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,354.98 : 998,031.46 = 266,089.38 : x
  2. Step 2: Convert to fraction form
    665,354.98/998,031.46 = 266,089.38/x
  3. Step 3: Cross multiply
    665,354.98x = 998,031.46 × 266,089.38
  4. Step 4: Simplify right side
    665,354.98x = 265,565,572,411.90
  5. Step 5: Solve for x
    x = 265,565,572,411.90/665,354.98
  6. Step 6: Final answer
    x = 399,133.67

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.