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Finding the Fourth Proportional to 528,763.32, 729,692.64 and 287,046

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Solution

The fourth proportional to 528,763.32, 729,692.64 and 287,046 is: 396,123.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,763.32 : 729,692.64 = 287,046 : x
  2. Step 2: Convert to fraction form
    528,763.32/729,692.64 = 287,046/x
  3. Step 3: Cross multiply
    528,763.32x = 729,692.64 × 287,046
  4. Step 4: Simplify right side
    528,763.32x = 209,455,353,541.44
  5. Step 5: Solve for x
    x = 209,455,353,541.44/528,763.32
  6. Step 6: Final answer
    x = 396,123.08

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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.