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Finding the Fourth Proportional to 657,347.64, 907,139.79 and 355,541.64

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Solution

The fourth proportional to 657,347.64, 907,139.79 and 355,541.64 is: 490,647.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,347.64 : 907,139.79 = 355,541.64 : x
  2. Step 2: Convert to fraction form
    657,347.64/907,139.79 = 355,541.64/x
  3. Step 3: Cross multiply
    657,347.64x = 907,139.79 × 355,541.64
  4. Step 4: Simplify right side
    657,347.64x = 322,525,968,645.86
  5. Step 5: Solve for x
    x = 322,525,968,645.86/657,347.64
  6. Step 6: Final answer
    x = 490,647.49

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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.