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Finding the Fourth Proportional to 528,368.22, 729,149.54 and 286,650.78

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Solution

The fourth proportional to 528,368.22, 729,149.54 and 286,650.78 is: 395,578.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,368.22 : 729,149.54 = 286,650.78 : x
  2. Step 2: Convert to fraction form
    528,368.22/729,149.54 = 286,650.78/x
  3. Step 3: Cross multiply
    528,368.22x = 729,149.54 × 286,650.78
  4. Step 4: Simplify right side
    528,368.22x = 209,011,282,944.39
  5. Step 5: Solve for x
    x = 209,011,282,944.39/528,368.22
  6. Step 6: Final answer
    x = 395,578.84

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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.