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Finding the Fourth Proportional to 478,309.55, 660,042.20 and 297,017.57

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Solution

The fourth proportional to 478,309.55, 660,042.20 and 297,017.57 is: 409,868.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,309.55 : 660,042.20 = 297,017.57 : x
  2. Step 2: Convert to fraction form
    478,309.55/660,042.20 = 297,017.57/x
  3. Step 3: Cross multiply
    478,309.55x = 660,042.20 × 297,017.57
  4. Step 4: Simplify right side
    478,309.55x = 196,044,125,556.16
  5. Step 5: Solve for x
    x = 196,044,125,556.16/478,309.55
  6. Step 6: Final answer
    x = 409,868.73

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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.