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Finding the Fourth Proportional to 660,699.28, 911,740.63 and 358,886.80

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Solution

The fourth proportional to 660,699.28, 911,740.63 and 358,886.80 is: 495,250.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,699.28 : 911,740.63 = 358,886.80 : x
  2. Step 2: Convert to fraction form
    660,699.28/911,740.63 = 358,886.80/x
  3. Step 3: Cross multiply
    660,699.28x = 911,740.63 × 358,886.80
  4. Step 4: Simplify right side
    660,699.28x = 327,211,677,130.68
  5. Step 5: Solve for x
    x = 327,211,677,130.68/660,699.28
  6. Step 6: Final answer
    x = 495,250.54

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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.