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Finding the Fourth Proportional to 713,090.76, 984,042.97 and 390,795

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Solution

The fourth proportional to 713,090.76, 984,042.97 and 390,795 is: 539,284.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,090.76 : 984,042.97 = 390,795 : x
  2. Step 2: Convert to fraction form
    713,090.76/984,042.97 = 390,795/x
  3. Step 3: Cross multiply
    713,090.76x = 984,042.97 × 390,795
  4. Step 4: Simplify right side
    713,090.76x = 384,559,072,461.15
  5. Step 5: Solve for x
    x = 384,559,072,461.15/713,090.76
  6. Step 6: Final answer
    x = 539,284.89

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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.