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Finding the Fourth Proportional to 642,739.80, 964,109.70 and 476,851.80

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Solution

The fourth proportional to 642,739.80, 964,109.70 and 476,851.80 is: 715,277.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,739.80 : 964,109.70 = 476,851.80 : x
  2. Step 2: Convert to fraction form
    642,739.80/964,109.70 = 476,851.80/x
  3. Step 3: Cross multiply
    642,739.80x = 964,109.70 × 476,851.80
  4. Step 4: Simplify right side
    642,739.80x = 459,737,445,842.46
  5. Step 5: Solve for x
    x = 459,737,445,842.46/642,739.80
  6. Step 6: Final answer
    x = 715,277.70

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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.