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Finding the Fourth Proportional to 390,798.83, 539,131.16 and 229,581.16

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Solution

The fourth proportional to 390,798.83, 539,131.16 and 229,581.16 is: 316,721.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,798.83 : 539,131.16 = 229,581.16 : x
  2. Step 2: Convert to fraction form
    390,798.83/539,131.16 = 229,581.16/x
  3. Step 3: Cross multiply
    390,798.83x = 539,131.16 × 229,581.16
  4. Step 4: Simplify right side
    390,798.83x = 123,774,356,331.07
  5. Step 5: Solve for x
    x = 123,774,356,331.07/390,798.83
  6. Step 6: Final answer
    x = 316,721.41

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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.