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Finding the Fourth Proportional to 630,756.30, 870,723.63 and 427,102.86

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Solution

The fourth proportional to 630,756.30, 870,723.63 and 427,102.86 is: 589,591.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,756.30 : 870,723.63 = 427,102.86 : x
  2. Step 2: Convert to fraction form
    630,756.30/870,723.63 = 427,102.86/x
  3. Step 3: Cross multiply
    630,756.30x = 870,723.63 × 427,102.86
  4. Step 4: Simplify right side
    630,756.30x = 371,888,552,642.58
  5. Step 5: Solve for x
    x = 371,888,552,642.58/630,756.30
  6. Step 6: Final answer
    x = 589,591.50

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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.