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Finding the Fourth Proportional to 885,720.20, 1,328,580.30 and 413,328.20

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Solution

The fourth proportional to 885,720.20, 1,328,580.30 and 413,328.20 is: 619,992.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,720.20 : 1,328,580.30 = 413,328.20 : x
  2. Step 2: Convert to fraction form
    885,720.20/1,328,580.30 = 413,328.20/x
  3. Step 3: Cross multiply
    885,720.20x = 1,328,580.30 × 413,328.20
  4. Step 4: Simplify right side
    885,720.20x = 549,139,703,954.46
  5. Step 5: Solve for x
    x = 549,139,703,954.46/885,720.20
  6. Step 6: Final answer
    x = 619,992.30

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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.