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Finding the Fourth Proportional to 579,168.72, 869,708.52 and 390,839.04

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Solution

The fourth proportional to 579,168.72, 869,708.52 and 390,839.04 is: 586,903.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,168.72 : 869,708.52 = 390,839.04 : x
  2. Step 2: Convert to fraction form
    579,168.72/869,708.52 = 390,839.04/x
  3. Step 3: Cross multiply
    579,168.72x = 869,708.52 × 390,839.04
  4. Step 4: Simplify right side
    579,168.72x = 339,916,043,036.62
  5. Step 5: Solve for x
    x = 339,916,043,036.62/579,168.72
  6. Step 6: Final answer
    x = 586,903.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.