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Finding the Fourth Proportional to 709,470.48, 979,090 and 387,201.26

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Solution

The fourth proportional to 709,470.48, 979,090 and 387,201.26 is: 534,349.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,470.48 : 979,090 = 387,201.26 : x
  2. Step 2: Convert to fraction form
    709,470.48/979,090 = 387,201.26/x
  3. Step 3: Cross multiply
    709,470.48x = 979,090 × 387,201.26
  4. Step 4: Simplify right side
    709,470.48x = 379,104,881,653.40
  5. Step 5: Solve for x
    x = 379,104,881,653.40/709,470.48
  6. Step 6: Final answer
    x = 534,349.06

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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.