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Finding the Fourth Proportional to 657,106.90, 921,815.90 and 657,106.90

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Solution

The fourth proportional to 657,106.90, 921,815.90 and 657,106.90 is: 921,815.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,106.90 : 921,815.90 = 657,106.90 : x
  2. Step 2: Convert to fraction form
    657,106.90/921,815.90 = 657,106.90/x
  3. Step 3: Cross multiply
    657,106.90x = 921,815.90 × 657,106.90
  4. Step 4: Simplify right side
    657,106.90x = 605,731,588,419.71
  5. Step 5: Solve for x
    x = 605,731,588,419.71/657,106.90
  6. Step 6: Final answer
    x = 921,815.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.