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Finding the Fourth Proportional to 705,060, 972,982.80 and 387,108

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Solution

The fourth proportional to 705,060, 972,982.80 and 387,108 is: 534,209.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,060 : 972,982.80 = 387,108 : x
  2. Step 2: Convert to fraction form
    705,060/972,982.80 = 387,108/x
  3. Step 3: Cross multiply
    705,060x = 972,982.80 × 387,108
  4. Step 4: Simplify right side
    705,060x = 376,649,425,742.40
  5. Step 5: Solve for x
    x = 376,649,425,742.40/705,060
  6. Step 6: Final answer
    x = 534,209.04

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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.