Home / 430,561.15-645,442.38-190,547.47

Finding the Fourth Proportional to 430,561.15, 645,442.38 and 190,547.47

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Solution

The fourth proportional to 430,561.15, 645,442.38 and 190,547.47 is: 285,644.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,561.15 : 645,442.38 = 190,547.47 : x
  2. Step 2: Convert to fraction form
    430,561.15/645,442.38 = 190,547.47/x
  3. Step 3: Cross multiply
    430,561.15x = 645,442.38 × 190,547.47
  4. Step 4: Simplify right side
    430,561.15x = 122,987,412,539.78
  5. Step 5: Solve for x
    x = 122,987,412,539.78/430,561.15
  6. Step 6: Final answer
    x = 285,644.47

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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.