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Finding the Fourth Proportional to 528,075, 728,789.58 and 289,657.08

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Solution

The fourth proportional to 528,075, 728,789.58 and 289,657.08 is: 399,752.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,075 : 728,789.58 = 289,657.08 : x
  2. Step 2: Convert to fraction form
    528,075/728,789.58 = 289,657.08/x
  3. Step 3: Cross multiply
    528,075x = 728,789.58 × 289,657.08
  4. Step 4: Simplify right side
    528,075x = 211,099,061,677.23
  5. Step 5: Solve for x
    x = 211,099,061,677.23/528,075
  6. Step 6: Final answer
    x = 399,752.05

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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.