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Finding the Fourth Proportional to 710,750.40, 980,835.60 and 388,460.40

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Solution

The fourth proportional to 710,750.40, 980,835.60 and 388,460.40 is: 536,075.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,750.40 : 980,835.60 = 388,460.40 : x
  2. Step 2: Convert to fraction form
    710,750.40/980,835.60 = 388,460.40/x
  3. Step 3: Cross multiply
    710,750.40x = 980,835.60 × 388,460.40
  4. Step 4: Simplify right side
    710,750.40x = 381,015,789,510.24
  5. Step 5: Solve for x
    x = 381,015,789,510.24/710,750.40
  6. Step 6: Final answer
    x = 536,075.38

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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.