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Finding the Fourth Proportional to 630,957.96, 870,821.97 and 401,275.77

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Solution

The fourth proportional to 630,957.96, 870,821.97 and 401,275.77 is: 553,824.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,957.96 : 870,821.97 = 401,275.77 : x
  2. Step 2: Convert to fraction form
    630,957.96/870,821.97 = 401,275.77/x
  3. Step 3: Cross multiply
    630,957.96x = 870,821.97 × 401,275.77
  4. Step 4: Simplify right side
    630,957.96x = 349,439,756,544.67
  5. Step 5: Solve for x
    x = 349,439,756,544.67/630,957.96
  6. Step 6: Final answer
    x = 553,824.15

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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.