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Finding the Fourth Proportional to 630,210.71, 869,701.14 and 343,730.79

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Solution

The fourth proportional to 630,210.71, 869,701.14 and 343,730.79 is: 474,354.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,210.71 : 869,701.14 = 343,730.79 : x
  2. Step 2: Convert to fraction form
    630,210.71/869,701.14 = 343,730.79/x
  3. Step 3: Cross multiply
    630,210.71x = 869,701.14 × 343,730.79
  4. Step 4: Simplify right side
    630,210.71x = 298,943,059,916.10
  5. Step 5: Solve for x
    x = 298,943,059,916.10/630,210.71
  6. Step 6: Final answer
    x = 474,354.14

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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.