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Finding the Fourth Proportional to 999,438.99, 1,379,221.47 and 540,554.01

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Solution

The fourth proportional to 999,438.99, 1,379,221.47 and 540,554.01 is: 745,962.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,438.99 : 1,379,221.47 = 540,554.01 : x
  2. Step 2: Convert to fraction form
    999,438.99/1,379,221.47 = 540,554.01/x
  3. Step 3: Cross multiply
    999,438.99x = 1,379,221.47 × 540,554.01
  4. Step 4: Simplify right side
    999,438.99x = 745,543,696,286.60
  5. Step 5: Solve for x
    x = 745,543,696,286.60/999,438.99
  6. Step 6: Final answer
    x = 745,962.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.