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Finding the Fourth Proportional to 528,661.32, 729,533.07 and 286,938.69

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Solution

The fourth proportional to 528,661.32, 729,533.07 and 286,938.69 is: 395,964.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,661.32 : 729,533.07 = 286,938.69 : x
  2. Step 2: Convert to fraction form
    528,661.32/729,533.07 = 286,938.69/x
  3. Step 3: Cross multiply
    528,661.32x = 729,533.07 × 286,938.69
  4. Step 4: Simplify right side
    528,661.32x = 209,331,263,417.48
  5. Step 5: Solve for x
    x = 209,331,263,417.48/528,661.32
  6. Step 6: Final answer
    x = 395,964.78

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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.