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Finding the Fourth Proportional to 553,368.40, 829,939.20 and 153,908.80

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Solution

The fourth proportional to 553,368.40, 829,939.20 and 153,908.80 is: 230,831.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,368.40 : 829,939.20 = 153,908.80 : x
  2. Step 2: Convert to fraction form
    553,368.40/829,939.20 = 153,908.80/x
  3. Step 3: Cross multiply
    553,368.40x = 829,939.20 × 153,908.80
  4. Step 4: Simplify right side
    553,368.40x = 127,734,946,344.96
  5. Step 5: Solve for x
    x = 127,734,946,344.96/553,368.40
  6. Step 6: Final answer
    x = 230,831.66

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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.