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Finding the Fourth Proportional to 630,803.16, 870,500.72 and 358,870.46

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Solution

The fourth proportional to 630,803.16, 870,500.72 and 358,870.46 is: 495,236.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,803.16 : 870,500.72 = 358,870.46 : x
  2. Step 2: Convert to fraction form
    630,803.16/870,500.72 = 358,870.46/x
  3. Step 3: Cross multiply
    630,803.16x = 870,500.72 × 358,870.46
  4. Step 4: Simplify right side
    630,803.16x = 312,396,990,361.40
  5. Step 5: Solve for x
    x = 312,396,990,361.40/630,803.16
  6. Step 6: Final answer
    x = 495,236.88

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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.