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Finding the Fourth Proportional to 456,210.80, 683,020.20 and 431,385.20

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Solution

The fourth proportional to 456,210.80, 683,020.20 and 431,385.20 is: 645,852.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,210.80 : 683,020.20 = 431,385.20 : x
  2. Step 2: Convert to fraction form
    456,210.80/683,020.20 = 431,385.20/x
  3. Step 3: Cross multiply
    456,210.80x = 683,020.20 × 431,385.20
  4. Step 4: Simplify right side
    456,210.80x = 294,644,805,581.04
  5. Step 5: Solve for x
    x = 294,644,805,581.04/456,210.80
  6. Step 6: Final answer
    x = 645,852.32

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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.