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Finding the Fourth Proportional to 885,689.40, 1,328,534.10 and 877,816.20

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Solution

The fourth proportional to 885,689.40, 1,328,534.10 and 877,816.20 is: 1,316,724.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,689.40 : 1,328,534.10 = 877,816.20 : x
  2. Step 2: Convert to fraction form
    885,689.40/1,328,534.10 = 877,816.20/x
  3. Step 3: Cross multiply
    885,689.40x = 1,328,534.10 × 877,816.20
  4. Step 4: Simplify right side
    885,689.40x = 1,166,208,755,232.42
  5. Step 5: Solve for x
    x = 1,166,208,755,232.42/885,689.40
  6. Step 6: Final answer
    x = 1,316,724.30

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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.