Home / 712,830.32-983,705.82-390,552.64

Finding the Fourth Proportional to 712,830.32, 983,705.82 and 390,552.64

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Solution

The fourth proportional to 712,830.32, 983,705.82 and 390,552.64 is: 538,962.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,830.32 : 983,705.82 = 390,552.64 : x
  2. Step 2: Convert to fraction form
    712,830.32/983,705.82 = 390,552.64/x
  3. Step 3: Cross multiply
    712,830.32x = 983,705.82 × 390,552.64
  4. Step 4: Simplify right side
    712,830.32x = 384,188,904,984.37
  5. Step 5: Solve for x
    x = 384,188,904,984.37/712,830.32
  6. Step 6: Final answer
    x = 538,962.63

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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.