Home / 900,405.40-1,242,666.62-518,506.60

Finding the Fourth Proportional to 900,405.40, 1,242,666.62 and 518,506.60

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Solution

The fourth proportional to 900,405.40, 1,242,666.62 and 518,506.60 is: 715,600.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    900,405.40 : 1,242,666.62 = 518,506.60 : x
  2. Step 2: Convert to fraction form
    900,405.40/1,242,666.62 = 518,506.60/x
  3. Step 3: Cross multiply
    900,405.40x = 1,242,666.62 × 518,506.60
  4. Step 4: Simplify right side
    900,405.40x = 644,330,844,069.69
  5. Step 5: Solve for x
    x = 644,330,844,069.69/900,405.40
  6. Step 6: Final answer
    x = 715,600.82

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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.