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Finding the Fourth Proportional to 657,779.40, 907,738.38 and 355,973.40

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Solution

The fourth proportional to 657,779.40, 907,738.38 and 355,973.40 is: 491,244.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,779.40 : 907,738.38 = 355,973.40 : x
  2. Step 2: Convert to fraction form
    657,779.40/907,738.38 = 355,973.40/x
  3. Step 3: Cross multiply
    657,779.40x = 907,738.38 × 355,973.40
  4. Step 4: Simplify right side
    657,779.40x = 323,130,717,439.09
  5. Step 5: Solve for x
    x = 323,130,717,439.09/657,779.40
  6. Step 6: Final answer
    x = 491,244.81

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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.