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Finding the Fourth Proportional to 710,509.78, 980,510.37 and 388,219.85

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Solution

The fourth proportional to 710,509.78, 980,510.37 and 388,219.85 is: 535,747.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,509.78 : 980,510.37 = 388,219.85 : x
  2. Step 2: Convert to fraction form
    710,509.78/980,510.37 = 388,219.85/x
  3. Step 3: Cross multiply
    710,509.78x = 980,510.37 × 388,219.85
  4. Step 4: Simplify right side
    710,509.78x = 380,653,591,598.75
  5. Step 5: Solve for x
    x = 380,653,591,598.75/710,509.78
  6. Step 6: Final answer
    x = 535,747.16

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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.