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Finding the Fourth Proportional to 708,806.58, 978,176.70 and 386,534.31

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Solution

The fourth proportional to 708,806.58, 978,176.70 and 386,534.31 is: 533,430.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,806.58 : 978,176.70 = 386,534.31 : x
  2. Step 2: Convert to fraction form
    708,806.58/978,176.70 = 386,534.31/x
  3. Step 3: Cross multiply
    708,806.58x = 978,176.70 × 386,534.31
  4. Step 4: Simplify right side
    708,806.58x = 378,098,855,792.58
  5. Step 5: Solve for x
    x = 378,098,855,792.58/708,806.58
  6. Step 6: Final answer
    x = 533,430.23

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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.