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Finding the Fourth Proportional to 528,510.43, 729,340.68 and 286,786.85

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Solution

The fourth proportional to 528,510.43, 729,340.68 and 286,786.85 is: 395,763.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,510.43 : 729,340.68 = 286,786.85 : x
  2. Step 2: Convert to fraction form
    528,510.43/729,340.68 = 286,786.85/x
  3. Step 3: Cross multiply
    528,510.43x = 729,340.68 × 286,786.85
  4. Step 4: Simplify right side
    528,510.43x = 209,165,316,194.06
  5. Step 5: Solve for x
    x = 209,165,316,194.06/528,510.43
  6. Step 6: Final answer
    x = 395,763.84

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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.