Home / 745,139.79-1,028,312.96-405,622.35

Finding the Fourth Proportional to 745,139.79, 1,028,312.96 and 405,622.35

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Solution

The fourth proportional to 745,139.79, 1,028,312.96 and 405,622.35 is: 559,769.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    745,139.79 : 1,028,312.96 = 405,622.35 : x
  2. Step 2: Convert to fraction form
    745,139.79/1,028,312.96 = 405,622.35/x
  3. Step 3: Cross multiply
    745,139.79x = 1,028,312.96 × 405,622.35
  4. Step 4: Simplify right side
    745,139.79x = 417,106,717,342.54
  5. Step 5: Solve for x
    x = 417,106,717,342.54/745,139.79
  6. Step 6: Final answer
    x = 559,769.75

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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.