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Finding the Fourth Proportional to 644,718.40, 889,484 and 368,874.76

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Solution

The fourth proportional to 644,718.40, 889,484 and 368,874.76 is: 508,917.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,718.40 : 889,484 = 368,874.76 : x
  2. Step 2: Convert to fraction form
    644,718.40/889,484 = 368,874.76/x
  3. Step 3: Cross multiply
    644,718.40x = 889,484 × 368,874.76
  4. Step 4: Simplify right side
    644,718.40x = 328,108,197,023.84
  5. Step 5: Solve for x
    x = 328,108,197,023.84/644,718.40
  6. Step 6: Final answer
    x = 508,917.07

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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.