Home / 645,547.20-890,837.13-355,157.34

Finding the Fourth Proportional to 645,547.20, 890,837.13 and 355,157.34

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Solution

The fourth proportional to 645,547.20, 890,837.13 and 355,157.34 is: 490,107.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,547.20 : 890,837.13 = 355,157.34 : x
  2. Step 2: Convert to fraction form
    645,547.20/890,837.13 = 355,157.34/x
  3. Step 3: Cross multiply
    645,547.20x = 890,837.13 × 355,157.34
  4. Step 4: Simplify right side
    645,547.20x = 316,387,345,464.03
  5. Step 5: Solve for x
    x = 316,387,345,464.03/645,547.20
  6. Step 6: Final answer
    x = 490,107.22

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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.