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Finding the Fourth Proportional to 528,561.70, 729,415.65 and 286,844.32

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Solution

The fourth proportional to 528,561.70, 729,415.65 and 286,844.32 is: 395,845.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,561.70 : 729,415.65 = 286,844.32 : x
  2. Step 2: Convert to fraction form
    528,561.70/729,415.65 = 286,844.32/x
  3. Step 3: Cross multiply
    528,561.70x = 729,415.65 × 286,844.32
  4. Step 4: Simplify right side
    528,561.70x = 209,228,736,121.61
  5. Step 5: Solve for x
    x = 209,228,736,121.61/528,561.70
  6. Step 6: Final answer
    x = 395,845.44

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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.