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Finding the Fourth Proportional to 708,891.62, 978,231.55 and 402,925.53

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Solution

The fourth proportional to 708,891.62, 978,231.55 and 402,925.53 is: 556,015.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,891.62 : 978,231.55 = 402,925.53 : x
  2. Step 2: Convert to fraction form
    708,891.62/978,231.55 = 402,925.53/x
  3. Step 3: Cross multiply
    708,891.62x = 978,231.55 × 402,925.53
  4. Step 4: Simplify right side
    708,891.62x = 394,154,465,746.47
  5. Step 5: Solve for x
    x = 394,154,465,746.47/708,891.62
  6. Step 6: Final answer
    x = 556,015.13

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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.