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Finding the Fourth Proportional to 528,555.10, 729,406.50 and 286,837.68

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Solution

The fourth proportional to 528,555.10, 729,406.50 and 286,837.68 is: 395,836.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,555.10 : 729,406.50 = 286,837.68 : x
  2. Step 2: Convert to fraction form
    528,555.10/729,406.50 = 286,837.68/x
  3. Step 3: Cross multiply
    528,555.10x = 729,406.50 × 286,837.68
  4. Step 4: Simplify right side
    528,555.10x = 209,221,268,236.92
  5. Step 5: Solve for x
    x = 209,221,268,236.92/528,555.10
  6. Step 6: Final answer
    x = 395,836.25

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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.