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Finding the Fourth Proportional to 876,417, 1,209,455.55 and 474,009

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Solution

The fourth proportional to 876,417, 1,209,455.55 and 474,009 is: 654,132.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,417 : 1,209,455.55 = 474,009 : x
  2. Step 2: Convert to fraction form
    876,417/1,209,455.55 = 474,009/x
  3. Step 3: Cross multiply
    876,417x = 1,209,455.55 × 474,009
  4. Step 4: Simplify right side
    876,417x = 573,292,815,799.95
  5. Step 5: Solve for x
    x = 573,292,815,799.95/876,417
  6. Step 6: Final answer
    x = 654,132.47

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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.