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Finding the Fourth Proportional to 630,919.31, 870,718.32 and 358,998.66

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Solution

The fourth proportional to 630,919.31, 870,718.32 and 358,998.66 is: 495,446.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,919.31 : 870,718.32 = 358,998.66 : x
  2. Step 2: Convert to fraction form
    630,919.31/870,718.32 = 358,998.66/x
  3. Step 3: Cross multiply
    630,919.31x = 870,718.32 × 358,998.66
  4. Step 4: Simplify right side
    630,919.31x = 312,586,710,117.45
  5. Step 5: Solve for x
    x = 312,586,710,117.45/630,919.31
  6. Step 6: Final answer
    x = 495,446.42

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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.