Home / 870,420.48-1,304,678.40-372,080.64

Finding the Fourth Proportional to 870,420.48, 1,304,678.40 and 372,080.64

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Solution

The fourth proportional to 870,420.48, 1,304,678.40 and 372,080.64 is: 557,713.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,420.48 : 1,304,678.40 = 372,080.64 : x
  2. Step 2: Convert to fraction form
    870,420.48/1,304,678.40 = 372,080.64/x
  3. Step 3: Cross multiply
    870,420.48x = 1,304,678.40 × 372,080.64
  4. Step 4: Simplify right side
    870,420.48x = 485,445,574,066.18
  5. Step 5: Solve for x
    x = 485,445,574,066.18/870,420.48
  6. Step 6: Final answer
    x = 557,713.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.