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Finding the Fourth Proportional to 525,785.80, 788,678.70 and 385,817.80

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Solution

The fourth proportional to 525,785.80, 788,678.70 and 385,817.80 is: 578,726.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,785.80 : 788,678.70 = 385,817.80 : x
  2. Step 2: Convert to fraction form
    525,785.80/788,678.70 = 385,817.80/x
  3. Step 3: Cross multiply
    525,785.80x = 788,678.70 × 385,817.80
  4. Step 4: Simplify right side
    525,785.80x = 304,286,280,940.86
  5. Step 5: Solve for x
    x = 304,286,280,940.86/525,785.80
  6. Step 6: Final answer
    x = 578,726.70

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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.