Home / 989,859.10-1,484,788.65-429,987.10

Finding the Fourth Proportional to 989,859.10, 1,484,788.65 and 429,987.10

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Solution

The fourth proportional to 989,859.10, 1,484,788.65 and 429,987.10 is: 644,980.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,859.10 : 1,484,788.65 = 429,987.10 : x
  2. Step 2: Convert to fraction form
    989,859.10/1,484,788.65 = 429,987.10/x
  3. Step 3: Cross multiply
    989,859.10x = 1,484,788.65 × 429,987.10
  4. Step 4: Simplify right side
    989,859.10x = 638,439,965,726.42
  5. Step 5: Solve for x
    x = 638,439,965,726.42/989,859.10
  6. Step 6: Final answer
    x = 644,980.65

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Similar ratio
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1.5x scale

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.