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Finding the Fourth Proportional to 644,417.49, 889,095.98 and 372,386.28

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Solution

The fourth proportional to 644,417.49, 889,095.98 and 372,386.28 is: 513,777.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,417.49 : 889,095.98 = 372,386.28 : x
  2. Step 2: Convert to fraction form
    644,417.49/889,095.98 = 372,386.28/x
  3. Step 3: Cross multiply
    644,417.49x = 889,095.98 × 372,386.28
  4. Step 4: Simplify right side
    644,417.49x = 331,087,138,247.74
  5. Step 5: Solve for x
    x = 331,087,138,247.74/644,417.49
  6. Step 6: Final answer
    x = 513,777.40

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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.