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Finding the Fourth Proportional to 656,897.40, 906,518.66 and 355,091.40

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Solution

The fourth proportional to 656,897.40, 906,518.66 and 355,091.40 is: 490,026.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,897.40 : 906,518.66 = 355,091.40 : x
  2. Step 2: Convert to fraction form
    656,897.40/906,518.66 = 355,091.40/x
  3. Step 3: Cross multiply
    656,897.40x = 906,518.66 × 355,091.40
  4. Step 4: Simplify right side
    656,897.40x = 321,896,978,330.07
  5. Step 5: Solve for x
    x = 321,896,978,330.07/656,897.40
  6. Step 6: Final answer
    x = 490,026.26

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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.