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Finding the Fourth Proportional to 528,679.09, 729,557.47 and 286,956.46

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Solution

The fourth proportional to 528,679.09, 729,557.47 and 286,956.46 is: 395,989.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,679.09 : 729,557.47 = 286,956.46 : x
  2. Step 2: Convert to fraction form
    528,679.09/729,557.47 = 286,956.46/x
  3. Step 3: Cross multiply
    528,679.09x = 729,557.47 × 286,956.46
  4. Step 4: Simplify right side
    528,679.09x = 209,351,226,416.47
  5. Step 5: Solve for x
    x = 209,351,226,416.47/528,679.09
  6. Step 6: Final answer
    x = 395,989.23

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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.