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Finding the Fourth Proportional to 655,534.90, 904,663.40 and 379,902.20

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Solution

The fourth proportional to 655,534.90, 904,663.40 and 379,902.20 is: 524,279.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,534.90 : 904,663.40 = 379,902.20 : x
  2. Step 2: Convert to fraction form
    655,534.90/904,663.40 = 379,902.20/x
  3. Step 3: Cross multiply
    655,534.90x = 904,663.40 × 379,902.20
  4. Step 4: Simplify right side
    655,534.90x = 343,683,615,919.48
  5. Step 5: Solve for x
    x = 343,683,615,919.48/655,534.90
  6. Step 6: Final answer
    x = 524,279.66

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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.