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Finding the Fourth Proportional to 710,488.84, 980,445.45 and 388,210

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Solution

The fourth proportional to 710,488.84, 980,445.45 and 388,210 is: 535,713.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,488.84 : 980,445.45 = 388,210 : x
  2. Step 2: Convert to fraction form
    710,488.84/980,445.45 = 388,210/x
  3. Step 3: Cross multiply
    710,488.84x = 980,445.45 × 388,210
  4. Step 4: Simplify right side
    710,488.84x = 380,618,728,144.50
  5. Step 5: Solve for x
    x = 380,618,728,144.50/710,488.84
  6. Step 6: Final answer
    x = 535,713.87

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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.