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Finding the Fourth Proportional to 656,988.47, 906,645.30 and 355,182.47

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Solution

The fourth proportional to 656,988.47, 906,645.30 and 355,182.47 is: 490,152.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,988.47 : 906,645.30 = 355,182.47 : x
  2. Step 2: Convert to fraction form
    656,988.47/906,645.30 = 355,182.47/x
  3. Step 3: Cross multiply
    656,988.47x = 906,645.30 × 355,182.47
  4. Step 4: Simplify right side
    656,988.47x = 322,024,516,600.55
  5. Step 5: Solve for x
    x = 322,024,516,600.55/656,988.47
  6. Step 6: Final answer
    x = 490,152.46

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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.