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Finding the Fourth Proportional to 704,991.93, 972,894.57 and 390,669.02

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Solution

The fourth proportional to 704,991.93, 972,894.57 and 390,669.02 is: 539,126.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,991.93 : 972,894.57 = 390,669.02 : x
  2. Step 2: Convert to fraction form
    704,991.93/972,894.57 = 390,669.02/x
  3. Step 3: Cross multiply
    704,991.93x = 972,894.57 × 390,669.02
  4. Step 4: Simplify right side
    704,991.93x = 380,079,767,741.61
  5. Step 5: Solve for x
    x = 380,079,767,741.61/704,991.93
  6. Step 6: Final answer
    x = 539,126.41

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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.