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Finding the Fourth Proportional to 655,106.03, 903,864.71 and 393,393.81

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Solution

The fourth proportional to 655,106.03, 903,864.71 and 393,393.81 is: 542,774.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,106.03 : 903,864.71 = 393,393.81 : x
  2. Step 2: Convert to fraction form
    655,106.03/903,864.71 = 393,393.81/x
  3. Step 3: Cross multiply
    655,106.03x = 903,864.71 × 393,393.81
  4. Step 4: Simplify right side
    655,106.03x = 355,574,780,024.48
  5. Step 5: Solve for x
    x = 355,574,780,024.48/655,106.03
  6. Step 6: Final answer
    x = 542,774.40

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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.