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Finding the Fourth Proportional to 456,987.18, 630,552.69 and 287,122.89

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Solution

The fourth proportional to 456,987.18, 630,552.69 and 287,122.89 is: 396,173.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,987.18 : 630,552.69 = 287,122.89 : x
  2. Step 2: Convert to fraction form
    456,987.18/630,552.69 = 287,122.89/x
  3. Step 3: Cross multiply
    456,987.18x = 630,552.69 × 287,122.89
  4. Step 4: Simplify right side
    456,987.18x = 181,046,110,650.07
  5. Step 5: Solve for x
    x = 181,046,110,650.07/456,987.18
  6. Step 6: Final answer
    x = 396,173.28

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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.