Home / 915,643.20-1,373,464.80-417,979.20

Finding the Fourth Proportional to 915,643.20, 1,373,464.80 and 417,979.20

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Solution

The fourth proportional to 915,643.20, 1,373,464.80 and 417,979.20 is: 626,968.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    915,643.20 : 1,373,464.80 = 417,979.20 : x
  2. Step 2: Convert to fraction form
    915,643.20/1,373,464.80 = 417,979.20/x
  3. Step 3: Cross multiply
    915,643.20x = 1,373,464.80 × 417,979.20
  4. Step 4: Simplify right side
    915,643.20x = 574,079,718,332.16
  5. Step 5: Solve for x
    x = 574,079,718,332.16/915,643.20
  6. Step 6: Final answer
    x = 626,968.80

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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.