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Finding the Fourth Proportional to 561,208.90, 774,455.70 and 306,561.10

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Solution

The fourth proportional to 561,208.90, 774,455.70 and 306,561.10 is: 423,047.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,208.90 : 774,455.70 = 306,561.10 : x
  2. Step 2: Convert to fraction form
    561,208.90/774,455.70 = 306,561.10/x
  3. Step 3: Cross multiply
    561,208.90x = 774,455.70 × 306,561.10
  4. Step 4: Simplify right side
    561,208.90x = 237,417,991,293.27
  5. Step 5: Solve for x
    x = 237,417,991,293.27/561,208.90
  6. Step 6: Final answer
    x = 423,047.45

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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.