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Finding the Fourth Proportional to 543,534.48, 748,843.32 and 420,604.11

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Solution

The fourth proportional to 543,534.48, 748,843.32 and 420,604.11 is: 579,478.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,534.48 : 748,843.32 = 420,604.11 : x
  2. Step 2: Convert to fraction form
    543,534.48/748,843.32 = 420,604.11/x
  3. Step 3: Cross multiply
    543,534.48x = 748,843.32 × 420,604.11
  4. Step 4: Simplify right side
    543,534.48x = 314,966,574,393.83
  5. Step 5: Solve for x
    x = 314,966,574,393.83/543,534.48
  6. Step 6: Final answer
    x = 579,478.56

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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.