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Finding the Fourth Proportional to 545,203.05, 752,612.82 and 388,140.20

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Solution

The fourth proportional to 545,203.05, 752,612.82 and 388,140.20 is: 535,799.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,203.05 : 752,612.82 = 388,140.20 : x
  2. Step 2: Convert to fraction form
    545,203.05/752,612.82 = 388,140.20/x
  3. Step 3: Cross multiply
    545,203.05x = 752,612.82 × 388,140.20
  4. Step 4: Simplify right side
    545,203.05x = 292,119,292,314.52
  5. Step 5: Solve for x
    x = 292,119,292,314.52/545,203.05
  6. Step 6: Final answer
    x = 535,799.08

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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.