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Finding the Fourth Proportional to 528,112.98, 728,775.63 and 286,391.16

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Solution

The fourth proportional to 528,112.98, 728,775.63 and 286,391.16 is: 395,208.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,112.98 : 728,775.63 = 286,391.16 : x
  2. Step 2: Convert to fraction form
    528,112.98/728,775.63 = 286,391.16/x
  3. Step 3: Cross multiply
    528,112.98x = 728,775.63 × 286,391.16
  4. Step 4: Simplify right side
    528,112.98x = 208,714,898,055.43
  5. Step 5: Solve for x
    x = 208,714,898,055.43/528,112.98
  6. Step 6: Final answer
    x = 395,208.80

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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.