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Finding the Fourth Proportional to 612,362.10, 918,698.40 and 432,800.82

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Solution

The fourth proportional to 612,362.10, 918,698.40 and 432,800.82 is: 649,310.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,362.10 : 918,698.40 = 432,800.82 : x
  2. Step 2: Convert to fraction form
    612,362.10/918,698.40 = 432,800.82/x
  3. Step 3: Cross multiply
    612,362.10x = 918,698.40 × 432,800.82
  4. Step 4: Simplify right side
    612,362.10x = 397,613,420,852.69
  5. Step 5: Solve for x
    x = 397,613,420,852.69/612,362.10
  6. Step 6: Final answer
    x = 649,310.96

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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.