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Finding the Fourth Proportional to 605,646.30, 907,485.30 and 521,009.40

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Solution

The fourth proportional to 605,646.30, 907,485.30 and 521,009.40 is: 780,667.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,646.30 : 907,485.30 = 521,009.40 : x
  2. Step 2: Convert to fraction form
    605,646.30/907,485.30 = 521,009.40/x
  3. Step 3: Cross multiply
    605,646.30x = 907,485.30 × 521,009.40
  4. Step 4: Simplify right side
    605,646.30x = 472,808,371,661.82
  5. Step 5: Solve for x
    x = 472,808,371,661.82/605,646.30
  6. Step 6: Final answer
    x = 780,667.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.