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Finding the Fourth Proportional to 690,106.64, 952,127.34 and 388,242.32

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Solution

The fourth proportional to 690,106.64, 952,127.34 and 388,242.32 is: 535,650.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,106.64 : 952,127.34 = 388,242.32 : x
  2. Step 2: Convert to fraction form
    690,106.64/952,127.34 = 388,242.32/x
  3. Step 3: Cross multiply
    690,106.64x = 952,127.34 × 388,242.32
  4. Step 4: Simplify right side
    690,106.64x = 369,656,127,417.03
  5. Step 5: Solve for x
    x = 369,656,127,417.03/690,106.64
  6. Step 6: Final answer
    x = 535,650.73

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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.