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Finding the Fourth Proportional to 420,017.40, 630,026.10 and 402,521.40

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Solution

The fourth proportional to 420,017.40, 630,026.10 and 402,521.40 is: 603,782.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,017.40 : 630,026.10 = 402,521.40 : x
  2. Step 2: Convert to fraction form
    420,017.40/630,026.10 = 402,521.40/x
  3. Step 3: Cross multiply
    420,017.40x = 630,026.10 × 402,521.40
  4. Step 4: Simplify right side
    420,017.40x = 253,598,987,808.54
  5. Step 5: Solve for x
    x = 253,598,987,808.54/420,017.40
  6. Step 6: Final answer
    x = 603,782.10

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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.