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Finding the Fourth Proportional to 205,607.40, 308,411.10 and 122,663.40

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Solution

The fourth proportional to 205,607.40, 308,411.10 and 122,663.40 is: 183,995.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,607.40 : 308,411.10 = 122,663.40 : x
  2. Step 2: Convert to fraction form
    205,607.40/308,411.10 = 122,663.40/x
  3. Step 3: Cross multiply
    205,607.40x = 308,411.10 × 122,663.40
  4. Step 4: Simplify right side
    205,607.40x = 37,830,754,123.74
  5. Step 5: Solve for x
    x = 37,830,754,123.74/205,607.40
  6. Step 6: Final answer
    x = 183,995.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.