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Finding the Fourth Proportional to 710,578.05, 980,585.82 and 388,280.72

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Solution

The fourth proportional to 710,578.05, 980,585.82 and 388,280.72 is: 535,820.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,578.05 : 980,585.82 = 388,280.72 : x
  2. Step 2: Convert to fraction form
    710,578.05/980,585.82 = 388,280.72/x
  3. Step 3: Cross multiply
    710,578.05x = 980,585.82 × 388,280.72
  4. Step 4: Simplify right side
    710,578.05x = 380,742,563,308.46
  5. Step 5: Solve for x
    x = 380,742,563,308.46/710,578.05
  6. Step 6: Final answer
    x = 535,820.89

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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.