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Finding the Fourth Proportional to 528,638.52, 729,189.25 and 313,626.32

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Solution

The fourth proportional to 528,638.52, 729,189.25 and 313,626.32 is: 432,607.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,638.52 : 729,189.25 = 313,626.32 : x
  2. Step 2: Convert to fraction form
    528,638.52/729,189.25 = 313,626.32/x
  3. Step 3: Cross multiply
    528,638.52x = 729,189.25 × 313,626.32
  4. Step 4: Simplify right side
    528,638.52x = 228,692,937,415.11
  5. Step 5: Solve for x
    x = 228,692,937,415.11/528,638.52
  6. Step 6: Final answer
    x = 432,607.40

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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.