Home / 890,160-1,228,420.80-487,743.36

Finding the Fourth Proportional to 890,160, 1,228,420.80 and 487,743.36

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Solution

The fourth proportional to 890,160, 1,228,420.80 and 487,743.36 is: 673,085.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,160 : 1,228,420.80 = 487,743.36 : x
  2. Step 2: Convert to fraction form
    890,160/1,228,420.80 = 487,743.36/x
  3. Step 3: Cross multiply
    890,160x = 1,228,420.80 × 487,743.36
  4. Step 4: Simplify right side
    890,160x = 599,154,088,485.89
  5. Step 5: Solve for x
    x = 599,154,088,485.89/890,160
  6. Step 6: Final answer
    x = 673,085.84

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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.