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Finding the Fourth Proportional to 630,803.12, 870,378.36 and 362,479.28

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Solution

The fourth proportional to 630,803.12, 870,378.36 and 362,479.28 is: 500,146.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,803.12 : 870,378.36 = 362,479.28 : x
  2. Step 2: Convert to fraction form
    630,803.12/870,378.36 = 362,479.28/x
  3. Step 3: Cross multiply
    630,803.12x = 870,378.36 × 362,479.28
  4. Step 4: Simplify right side
    630,803.12x = 315,494,121,260.38
  5. Step 5: Solve for x
    x = 315,494,121,260.38/630,803.12
  6. Step 6: Final answer
    x = 500,146.74

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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.