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Finding the Fourth Proportional to 630,805.40, 870,532.08 and 344,340.80

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Solution

The fourth proportional to 630,805.40, 870,532.08 and 344,340.80 is: 475,201.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,805.40 : 870,532.08 = 344,340.80 : x
  2. Step 2: Convert to fraction form
    630,805.40/870,532.08 = 344,340.80/x
  3. Step 3: Cross multiply
    630,805.40x = 870,532.08 × 344,340.80
  4. Step 4: Simplify right side
    630,805.40x = 299,759,712,852.86
  5. Step 5: Solve for x
    x = 299,759,712,852.86/630,805.40
  6. Step 6: Final answer
    x = 475,201.56

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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.