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Finding the Fourth Proportional to 528,161.28, 728,862.96 and 286,443.80

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Solution

The fourth proportional to 528,161.28, 728,862.96 and 286,443.80 is: 395,292.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,161.28 : 728,862.96 = 286,443.80 : x
  2. Step 2: Convert to fraction form
    528,161.28/728,862.96 = 286,443.80/x
  3. Step 3: Cross multiply
    528,161.28x = 728,862.96 × 286,443.80
  4. Step 4: Simplify right side
    528,161.28x = 208,778,275,941.65
  5. Step 5: Solve for x
    x = 208,778,275,941.65/528,161.28
  6. Step 6: Final answer
    x = 395,292.66

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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.