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Finding the Fourth Proportional to 630,957.21, 870,820.92 and 401,275.02

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Solution

The fourth proportional to 630,957.21, 870,820.92 and 401,275.02 is: 553,823.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,957.21 : 870,820.92 = 401,275.02 : x
  2. Step 2: Convert to fraction form
    630,957.21/870,820.92 = 401,275.02/x
  3. Step 3: Cross multiply
    630,957.21x = 870,820.92 × 401,275.02
  4. Step 4: Simplify right side
    630,957.21x = 349,438,682,089.42
  5. Step 5: Solve for x
    x = 349,438,682,089.42/630,957.21
  6. Step 6: Final answer
    x = 553,823.11

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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.