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Finding the Fourth Proportional to 713,768.40, 985,036.48 and 391,508.48

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Solution

The fourth proportional to 713,768.40, 985,036.48 and 391,508.48 is: 540,301.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,768.40 : 985,036.48 = 391,508.48 : x
  2. Step 2: Convert to fraction form
    713,768.40/985,036.48 = 391,508.48/x
  3. Step 3: Cross multiply
    713,768.40x = 985,036.48 × 391,508.48
  4. Step 4: Simplify right side
    713,768.40x = 385,650,136,513.17
  5. Step 5: Solve for x
    x = 385,650,136,513.17/713,768.40
  6. Step 6: Final answer
    x = 540,301.50

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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.