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Finding the Fourth Proportional to 727,421.80, 1,003,803.01 and 400,724.10

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Solution

The fourth proportional to 727,421.80, 1,003,803.01 and 400,724.10 is: 552,977.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    727,421.80 : 1,003,803.01 = 400,724.10 : x
  2. Step 2: Convert to fraction form
    727,421.80/1,003,803.01 = 400,724.10/x
  3. Step 3: Cross multiply
    727,421.80x = 1,003,803.01 × 400,724.10
  4. Step 4: Simplify right side
    727,421.80x = 402,248,057,759.54
  5. Step 5: Solve for x
    x = 402,248,057,759.54/727,421.80
  6. Step 6: Final answer
    x = 552,977.73

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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.