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Finding the Fourth Proportional to 708,605.48, 978,148.58 and 519,123.88

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Solution

The fourth proportional to 708,605.48, 978,148.58 and 519,123.88 is: 716,590.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,605.48 : 978,148.58 = 519,123.88 : x
  2. Step 2: Convert to fraction form
    708,605.48/978,148.58 = 519,123.88/x
  3. Step 3: Cross multiply
    708,605.48x = 978,148.58 × 519,123.88
  4. Step 4: Simplify right side
    708,605.48x = 507,780,286,066.09
  5. Step 5: Solve for x
    x = 507,780,286,066.09/708,605.48
  6. Step 6: Final answer
    x = 716,590.97

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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.