Home / 420,528.08-630,549.73-287,569.42

Finding the Fourth Proportional to 420,528.08, 630,549.73 and 287,569.42

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Solution

The fourth proportional to 420,528.08, 630,549.73 and 287,569.42 is: 431,188.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,528.08 : 630,549.73 = 287,569.42 : x
  2. Step 2: Convert to fraction form
    420,528.08/630,549.73 = 287,569.42/x
  3. Step 3: Cross multiply
    420,528.08x = 630,549.73 × 287,569.42
  4. Step 4: Simplify right side
    420,528.08x = 181,326,820,137.26
  5. Step 5: Solve for x
    x = 181,326,820,137.26/420,528.08
  6. Step 6: Final answer
    x = 431,188.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.