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Finding the Fourth Proportional to 911,426.06, 1,257,768 and 509,018.06

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Solution

The fourth proportional to 911,426.06, 1,257,768 and 509,018.06 is: 702,444.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,426.06 : 1,257,768 = 509,018.06 : x
  2. Step 2: Convert to fraction form
    911,426.06/1,257,768 = 509,018.06/x
  3. Step 3: Cross multiply
    911,426.06x = 1,257,768 × 509,018.06
  4. Step 4: Simplify right side
    911,426.06x = 640,226,630,434.50
  5. Step 5: Solve for x
    x = 640,226,630,434.50/911,426.06
  6. Step 6: Final answer
    x = 702,444.95

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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.