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Finding the Fourth Proportional to 876,398.63, 1,209,430.10 and 473,990.63

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Solution

The fourth proportional to 876,398.63, 1,209,430.10 and 473,990.63 is: 654,107.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,398.63 : 1,209,430.10 = 473,990.63 : x
  2. Step 2: Convert to fraction form
    876,398.63/1,209,430.10 = 473,990.63/x
  3. Step 3: Cross multiply
    876,398.63x = 1,209,430.10 × 473,990.63
  4. Step 4: Simplify right side
    876,398.63x = 573,258,530,177.79
  5. Step 5: Solve for x
    x = 573,258,530,177.79/876,398.63
  6. Step 6: Final answer
    x = 654,107.06

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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.