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Finding the Fourth Proportional to 657,621.45, 921,603.15 and 657,621.45

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Solution

The fourth proportional to 657,621.45, 921,603.15 and 657,621.45 is: 921,603.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,621.45 : 921,603.15 = 657,621.45 : x
  2. Step 2: Convert to fraction form
    657,621.45/921,603.15 = 657,621.45/x
  3. Step 3: Cross multiply
    657,621.45x = 921,603.15 × 657,621.45
  4. Step 4: Simplify right side
    657,621.45x = 606,065,999,827.57
  5. Step 5: Solve for x
    x = 606,065,999,827.57/657,621.45
  6. Step 6: Final answer
    x = 921,603.15

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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.