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Finding the Fourth Proportional to 720,000.90, 993,595.01 and 397,733.49

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Solution

The fourth proportional to 720,000.90, 993,595.01 and 397,733.49 is: 548,868.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,000.90 : 993,595.01 = 397,733.49 : x
  2. Step 2: Convert to fraction form
    720,000.90/993,595.01 = 397,733.49/x
  3. Step 3: Cross multiply
    720,000.90x = 993,595.01 × 397,733.49
  4. Step 4: Simplify right side
    720,000.90x = 395,186,008,985.22
  5. Step 5: Solve for x
    x = 395,186,008,985.22/720,000.90
  6. Step 6: Final answer
    x = 548,868.77

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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.