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Finding the Fourth Proportional to 528,698.71, 729,604.92 and 286,981.12

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Solution

The fourth proportional to 528,698.71, 729,604.92 and 286,981.12 is: 396,034.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,698.71 : 729,604.92 = 286,981.12 : x
  2. Step 2: Convert to fraction form
    528,698.71/729,604.92 = 286,981.12/x
  3. Step 3: Cross multiply
    528,698.71x = 729,604.92 × 286,981.12
  4. Step 4: Simplify right side
    528,698.71x = 209,382,837,099.11
  5. Step 5: Solve for x
    x = 209,382,837,099.11/528,698.71
  6. Step 6: Final answer
    x = 396,034.33

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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.