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Finding the Fourth Proportional to 672,907.32, 928,505.57 and 400,968.45

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Solution

The fourth proportional to 672,907.32, 928,505.57 and 400,968.45 is: 553,272.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,907.32 : 928,505.57 = 400,968.45 : x
  2. Step 2: Convert to fraction form
    672,907.32/928,505.57 = 400,968.45/x
  3. Step 3: Cross multiply
    672,907.32x = 928,505.57 × 400,968.45
  4. Step 4: Simplify right side
    672,907.32x = 372,301,437,214.42
  5. Step 5: Solve for x
    x = 372,301,437,214.42/672,907.32
  6. Step 6: Final answer
    x = 553,272.98

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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.