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Finding the Fourth Proportional to 489,417.96, 675,686.34 and 308,285.16

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Solution

The fourth proportional to 489,417.96, 675,686.34 and 308,285.16 is: 425,615.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,417.96 : 675,686.34 = 308,285.16 : x
  2. Step 2: Convert to fraction form
    489,417.96/675,686.34 = 308,285.16/x
  3. Step 3: Cross multiply
    489,417.96x = 675,686.34 × 308,285.16
  4. Step 4: Simplify right side
    489,417.96x = 208,304,071,436.71
  5. Step 5: Solve for x
    x = 208,304,071,436.71/489,417.96
  6. Step 6: Final answer
    x = 425,615.91

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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.