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Finding the Fourth Proportional to 391,419.52, 539,973.48 and 264,136.16

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Solution

The fourth proportional to 391,419.52, 539,973.48 and 264,136.16 is: 364,382.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,419.52 : 539,973.48 = 264,136.16 : x
  2. Step 2: Convert to fraction form
    391,419.52/539,973.48 = 264,136.16/x
  3. Step 3: Cross multiply
    391,419.52x = 539,973.48 × 264,136.16
  4. Step 4: Simplify right side
    391,419.52x = 142,626,521,509.04
  5. Step 5: Solve for x
    x = 142,626,521,509.04/391,419.52
  6. Step 6: Final answer
    x = 364,382.75

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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.