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Finding the Fourth Proportional to 630,420.06, 870,004.08 and 358,512.78

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Solution

The fourth proportional to 630,420.06, 870,004.08 and 358,512.78 is: 494,761.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,420.06 : 870,004.08 = 358,512.78 : x
  2. Step 2: Convert to fraction form
    630,420.06/870,004.08 = 358,512.78/x
  3. Step 3: Cross multiply
    630,420.06x = 870,004.08 × 358,512.78
  4. Step 4: Simplify right side
    630,420.06x = 311,907,581,332.14
  5. Step 5: Solve for x
    x = 311,907,581,332.14/630,420.06
  6. Step 6: Final answer
    x = 494,761.51

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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.