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Finding the Fourth Proportional to 710,594, 980,578.40 and 388,306.74

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Solution

The fourth proportional to 710,594, 980,578.40 and 388,306.74 is: 535,840.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,594 : 980,578.40 = 388,306.74 : x
  2. Step 2: Convert to fraction form
    710,594/980,578.40 = 388,306.74/x
  3. Step 3: Cross multiply
    710,594x = 980,578.40 × 388,306.74
  4. Step 4: Simplify right side
    710,594x = 380,765,201,818.42
  5. Step 5: Solve for x
    x = 380,765,201,818.42/710,594
  6. Step 6: Final answer
    x = 535,840.72

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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.