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Finding the Fourth Proportional to 710,425.98, 980,401.95 and 388,156.01

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Solution

The fourth proportional to 710,425.98, 980,401.95 and 388,156.01 is: 535,662.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,425.98 : 980,401.95 = 388,156.01 : x
  2. Step 2: Convert to fraction form
    710,425.98/980,401.95 = 388,156.01/x
  3. Step 3: Cross multiply
    710,425.98x = 980,401.95 × 388,156.01
  4. Step 4: Simplify right side
    710,425.98x = 380,548,904,206.21
  5. Step 5: Solve for x
    x = 380,548,904,206.21/710,425.98
  6. Step 6: Final answer
    x = 535,662.99

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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.