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Finding the Fourth Proportional to 630,849.28, 870,455.57 and 358,901.30

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Solution

The fourth proportional to 630,849.28, 870,455.57 and 358,901.30 is: 495,217.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,849.28 : 870,455.57 = 358,901.30 : x
  2. Step 2: Convert to fraction form
    630,849.28/870,455.57 = 358,901.30/x
  3. Step 3: Cross multiply
    630,849.28x = 870,455.57 × 358,901.30
  4. Step 4: Simplify right side
    630,849.28x = 312,407,635,665.24
  5. Step 5: Solve for x
    x = 312,407,635,665.24/630,849.28
  6. Step 6: Final answer
    x = 495,217.55

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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.