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Finding the Fourth Proportional to 656,807.40, 906,395.40 and 355,001.40

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Solution

The fourth proportional to 656,807.40, 906,395.40 and 355,001.40 is: 489,902.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,807.40 : 906,395.40 = 355,001.40 : x
  2. Step 2: Convert to fraction form
    656,807.40/906,395.40 = 355,001.40/x
  3. Step 3: Cross multiply
    656,807.40x = 906,395.40 × 355,001.40
  4. Step 4: Simplify right side
    656,807.40x = 321,771,635,953.56
  5. Step 5: Solve for x
    x = 321,771,635,953.56/656,807.40
  6. Step 6: Final answer
    x = 489,902.57

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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.