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Finding the Fourth Proportional to 528,626.40, 729,505.16 and 286,908.98

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Solution

The fourth proportional to 528,626.40, 729,505.16 and 286,908.98 is: 395,934.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,626.40 : 729,505.16 = 286,908.98 : x
  2. Step 2: Convert to fraction form
    528,626.40/729,505.16 = 286,908.98/x
  3. Step 3: Cross multiply
    528,626.40x = 729,505.16 × 286,908.98
  4. Step 4: Simplify right side
    528,626.40x = 209,301,576,278.27
  5. Step 5: Solve for x
    x = 209,301,576,278.27/528,626.40
  6. Step 6: Final answer
    x = 395,934.78

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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.