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Finding the Fourth Proportional to 630,482.10, 870,194.80 and 385,508.74

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Solution

The fourth proportional to 630,482.10, 870,194.80 and 385,508.74 is: 532,081.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,482.10 : 870,194.80 = 385,508.74 : x
  2. Step 2: Convert to fraction form
    630,482.10/870,194.80 = 385,508.74/x
  3. Step 3: Cross multiply
    630,482.10x = 870,194.80 × 385,508.74
  4. Step 4: Simplify right side
    630,482.10x = 335,467,700,902.55
  5. Step 5: Solve for x
    x = 335,467,700,902.55/630,482.10
  6. Step 6: Final answer
    x = 532,081.25

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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.