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Finding the Fourth Proportional to 630,740.63, 870,365.92 and 351,316.43

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Solution

The fourth proportional to 630,740.63, 870,365.92 and 351,316.43 is: 484,785.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,740.63 : 870,365.92 = 351,316.43 : x
  2. Step 2: Convert to fraction form
    630,740.63/870,365.92 = 351,316.43/x
  3. Step 3: Cross multiply
    630,740.63x = 870,365.92 × 351,316.43
  4. Step 4: Simplify right side
    630,740.63x = 305,773,849,126.08
  5. Step 5: Solve for x
    x = 305,773,849,126.08/630,740.63
  6. Step 6: Final answer
    x = 484,785.40

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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.