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Finding the Fourth Proportional to 750,390, 1,035,637.08 and 428,026.32

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Solution

The fourth proportional to 750,390, 1,035,637.08 and 428,026.32 is: 590,732.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    750,390 : 1,035,637.08 = 428,026.32 : x
  2. Step 2: Convert to fraction form
    750,390/1,035,637.08 = 428,026.32/x
  3. Step 3: Cross multiply
    750,390x = 1,035,637.08 × 428,026.32
  4. Step 4: Simplify right side
    750,390x = 443,279,928,207.95
  5. Step 5: Solve for x
    x = 443,279,928,207.95/750,390
  6. Step 6: Final answer
    x = 590,732.72

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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.