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Finding the Fourth Proportional to 530,995.95, 732,782.34 and 289,278.45

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Solution

The fourth proportional to 530,995.95, 732,782.34 and 289,278.45 is: 399,208.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,995.95 : 732,782.34 = 289,278.45 : x
  2. Step 2: Convert to fraction form
    530,995.95/732,782.34 = 289,278.45/x
  3. Step 3: Cross multiply
    530,995.95x = 732,782.34 × 289,278.45
  4. Step 4: Simplify right side
    530,995.95x = 211,978,139,502.57
  5. Step 5: Solve for x
    x = 211,978,139,502.57/530,995.95
  6. Step 6: Final answer
    x = 399,208.58

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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.