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Finding the Fourth Proportional to 404,728.40, 606,703.80 and 314,721.20

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Solution

The fourth proportional to 404,728.40, 606,703.80 and 314,721.20 is: 471,779.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,728.40 : 606,703.80 = 314,721.20 : x
  2. Step 2: Convert to fraction form
    404,728.40/606,703.80 = 314,721.20/x
  3. Step 3: Cross multiply
    404,728.40x = 606,703.80 × 314,721.20
  4. Step 4: Simplify right side
    404,728.40x = 190,942,547,980.56
  5. Step 5: Solve for x
    x = 190,942,547,980.56/404,728.40
  6. Step 6: Final answer
    x = 471,779.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.