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Finding the Fourth Proportional to 710,568.40, 980,555.12 and 388,289.60

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Solution

The fourth proportional to 710,568.40, 980,555.12 and 388,289.60 is: 535,823.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,568.40 : 980,555.12 = 388,289.60 : x
  2. Step 2: Convert to fraction form
    710,568.40/980,555.12 = 388,289.60/x
  3. Step 3: Cross multiply
    710,568.40x = 980,555.12 × 388,289.60
  4. Step 4: Simplify right side
    710,568.40x = 380,739,355,322.75
  5. Step 5: Solve for x
    x = 380,739,355,322.75/710,568.40
  6. Step 6: Final answer
    x = 535,823.65

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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.