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Finding the Fourth Proportional to 528,575.49, 729,439.56 and 286,860.15

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Solution

The fourth proportional to 528,575.49, 729,439.56 and 286,860.15 is: 395,869.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,575.49 : 729,439.56 = 286,860.15 : x
  2. Step 2: Convert to fraction form
    528,575.49/729,439.56 = 286,860.15/x
  3. Step 3: Cross multiply
    528,575.49x = 729,439.56 × 286,860.15
  4. Step 4: Simplify right side
    528,575.49x = 209,247,141,597.53
  5. Step 5: Solve for x
    x = 209,247,141,597.53/528,575.49
  6. Step 6: Final answer
    x = 395,869.93

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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.