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Finding the Fourth Proportional to 916,638, 1,264,941.40 and 508,716.14

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Solution

The fourth proportional to 916,638, 1,264,941.40 and 508,716.14 is: 702,017.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    916,638 : 1,264,941.40 = 508,716.14 : x
  2. Step 2: Convert to fraction form
    916,638/1,264,941.40 = 508,716.14/x
  3. Step 3: Cross multiply
    916,638x = 1,264,941.40 × 508,716.14
  4. Step 4: Simplify right side
    916,638x = 643,496,106,334.20
  5. Step 5: Solve for x
    x = 643,496,106,334.20/916,638
  6. Step 6: Final answer
    x = 702,017.71

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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.