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Finding the Fourth Proportional to 659,409.51, 909,985.64 and 357,603.51

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Solution

The fourth proportional to 659,409.51, 909,985.64 and 357,603.51 is: 493,493.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,409.51 : 909,985.64 = 357,603.51 : x
  2. Step 2: Convert to fraction form
    659,409.51/909,985.64 = 357,603.51/x
  3. Step 3: Cross multiply
    659,409.51x = 909,985.64 × 357,603.51
  4. Step 4: Simplify right side
    659,409.51x = 325,414,057,125.58
  5. Step 5: Solve for x
    x = 325,414,057,125.58/659,409.51
  6. Step 6: Final answer
    x = 493,493.12

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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.