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Finding the Fourth Proportional to 630,919.18, 870,718.17 and 358,998.54

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Solution

The fourth proportional to 630,919.18, 870,718.17 and 358,998.54 is: 495,446.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,919.18 : 870,718.17 = 358,998.54 : x
  2. Step 2: Convert to fraction form
    630,919.18/870,718.17 = 358,998.54/x
  3. Step 3: Cross multiply
    630,919.18x = 870,718.17 × 358,998.54
  4. Step 4: Simplify right side
    630,919.18x = 312,586,551,781.47
  5. Step 5: Solve for x
    x = 312,586,551,781.47/630,919.18
  6. Step 6: Final answer
    x = 495,446.27

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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.