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Finding the Fourth Proportional to 630,919.29, 870,718.31 and 358,998.63

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Solution

The fourth proportional to 630,919.29, 870,718.31 and 358,998.63 is: 495,446.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,919.29 : 870,718.31 = 358,998.63 : x
  2. Step 2: Convert to fraction form
    630,919.29/870,718.31 = 358,998.63/x
  3. Step 3: Cross multiply
    630,919.29x = 870,718.31 × 358,998.63
  4. Step 4: Simplify right side
    630,919.29x = 312,586,678,610.92
  5. Step 5: Solve for x
    x = 312,586,678,610.92/630,919.29
  6. Step 6: Final answer
    x = 495,446.38

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1.5x scale

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.