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Finding the Fourth Proportional to 666,166.55, 999,106.65 and 210,793.86

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Solution

The fourth proportional to 666,166.55, 999,106.65 and 210,793.86 is: 316,145.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,166.55 : 999,106.65 = 210,793.86 : x
  2. Step 2: Convert to fraction form
    666,166.55/999,106.65 = 210,793.86/x
  3. Step 3: Cross multiply
    666,166.55x = 999,106.65 × 210,793.86
  4. Step 4: Simplify right side
    666,166.55x = 210,605,547,305.17
  5. Step 5: Solve for x
    x = 210,605,547,305.17/666,166.55
  6. Step 6: Final answer
    x = 316,145.49

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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.