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Finding the Fourth Proportional to 387,578.97, 535,119.93 and 346,615.83

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Solution

The fourth proportional to 387,578.97, 535,119.93 and 346,615.83 is: 478,563.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,578.97 : 535,119.93 = 346,615.83 : x
  2. Step 2: Convert to fraction form
    387,578.97/535,119.93 = 346,615.83/x
  3. Step 3: Cross multiply
    387,578.97x = 535,119.93 × 346,615.83
  4. Step 4: Simplify right side
    387,578.97x = 185,481,038,686.49
  5. Step 5: Solve for x
    x = 185,481,038,686.49/387,578.97
  6. Step 6: Final answer
    x = 478,563.22

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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.