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Finding the Fourth Proportional to 710,303.85, 980,240.40 and 388,019.30

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Solution

The fourth proportional to 710,303.85, 980,240.40 and 388,019.30 is: 535,478.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,303.85 : 980,240.40 = 388,019.30 : x
  2. Step 2: Convert to fraction form
    710,303.85/980,240.40 = 388,019.30/x
  3. Step 3: Cross multiply
    710,303.85x = 980,240.40 × 388,019.30
  4. Step 4: Simplify right side
    710,303.85x = 380,352,188,938.52
  5. Step 5: Solve for x
    x = 380,352,188,938.52/710,303.85
  6. Step 6: Final answer
    x = 535,478.15

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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.