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Finding the Fourth Proportional to 712,745.33, 983,585.63 and 390,475.49

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Solution

The fourth proportional to 712,745.33, 983,585.63 and 390,475.49 is: 538,854.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,745.33 : 983,585.63 = 390,475.49 : x
  2. Step 2: Convert to fraction form
    712,745.33/983,585.63 = 390,475.49/x
  3. Step 3: Cross multiply
    712,745.33x = 983,585.63 × 390,475.49
  4. Step 4: Simplify right side
    712,745.33x = 384,066,076,889.47
  5. Step 5: Solve for x
    x = 384,066,076,889.47/712,745.33
  6. Step 6: Final answer
    x = 538,854.57

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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.