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Finding the Fourth Proportional to 917,892, 1,266,336 and 676,746.72

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Solution

The fourth proportional to 917,892, 1,266,336 and 676,746.72 is: 933,648.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,892 : 1,266,336 = 676,746.72 : x
  2. Step 2: Convert to fraction form
    917,892/1,266,336 = 676,746.72/x
  3. Step 3: Cross multiply
    917,892x = 1,266,336 × 676,746.72
  4. Step 4: Simplify right side
    917,892x = 856,988,734,417.92
  5. Step 5: Solve for x
    x = 856,988,734,417.92/917,892
  6. Step 6: Final answer
    x = 933,648.77

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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.